Segmentation Graphs

Hi,
In the segment builder in 2007,you can apparently able to see the distribution of attribute values among business partners in a graphical format (eg. Pie Chart or Bar Graph).
I am having some difficulties trying to get the graph to display against my attribute set in the graphical modeler.
In config, I created my own Attribute Type and assigned it against all UI-Types and the Display Type of Pie Chart. I then assigned my Attribute Type against my attribute set.
Is there any steps i have missed as the pie chart is still not showing in the graphical modeler.
Any help would be greatly appreciated and will award points.
Regards,
David
Edited by: David Sabharwal on Jan 20, 2009 10:48 AM

from my point of view, FF can sometimes find itself (through certain profiles) in problems.
So the best way to get out that situation is to uninstall FF (check that "C:\Program Files\Mozilla Firefox" is empty, or doesn't exist) and phisically REMOVE all profiles entry in user profile (C:\Documents and Settings\user_name\Application Data\Mozilla and C:\Documents and Settings\user_name\Local Settings\Application Data\Mozilla\Firefox)
Then uninstall SVG plugin (it should be in Control panel/add remove app).
So after that try to reinstall FF (2.0.2 is prefferred version now) and SVG from Adobe (current is 3.03 version) and all should work cool and smoothly.
We found on some users PC that upgrading-downgrading versions as well as "transporting" profiles under curious circumstances may result in inappropriate profile and...all went wrong.

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How do I display the next segment of an LVM file on a graph?

I have built an application which reads in an LVM file containing 16 waveforms. I am taking 1000 samples at 1kHz. The capture may last for up to 3 minutes, so I generate a sizable file. When I read this file back and display it I only get the first segment of 1000 samples (1 second). Generally this is fine, but I want to be able to select to view the other segments as well. I have been attempting to use the "Read Measurement File" express vi.
I have also tried to put the "Read Measurement File" in a while loop until I hit EOF and tied it to an "Append Signals" express vi before feeding it into the graph. This allowed me to see the last segment of my capture.
I understand that the amount of data I am trying to display would be too much for the graph, but isn't there some way I can point to a segment and display it? The perfect answer would be to grab the timestamps of the segment headers in my file and populate a listbox. (I am generating this file with headers for each segment.) Then I could scroll through the listbox and select the "second" that I want to examine. Then I need the "selected second" to display on the graph. I suspect that this is possible because I am already pulling the waveform names from the file and feeding them into a listbox so I can select which waveform(s) I want to examine.
Any Ideas?
technomage

Hi there,
Have you considered using the TDM file format instead of the LVM format? With TDM you specify parameters for your file and your channels. When you want to read data from the file you can extrac data based on those parameters. So you could construct a search that extracts the data from a particular time, or all the data that was acquired in a 10 minute period for example.
There are a few VIs you would have to become familiar with to do this (the datalog VIs are located in a palette on the File IO palette), but it would probably be easier for you to use these then to construct the file yourself and then program in all the search parameters.
Here are some resources with more information on the TDM format:
TDM Data Format
Introduction to LabVIEW Data Storage VIs
They should help you decide if you would like to use this format or stick with the LVM format.
Sarah
Applications Engineer | National Instruments | UK & Ireland

3d graph line segment

Hi:
I'm trying to find a way to draw a series of x,y,z points to a 3d graph with each point linked to the last with a line segment. I have been successfull in plotting a series of points to the 3d graph indicator in LabView but I cannot figure out how to connect them with line segments ... does anyone know how this might be done? Thanks in advance for any help.

When the cwlinepoint property is activated the graph draws a line from each point to each point which is not what I'm trying to do ... the code I have written is extremely basic ... three 1d arrays each containing number set (one array with x coordinates, one array with y coords, ect.) these are then passed to the CWGraph3D invoke node ... then the points are plotted to the 3d graph as just points ... which is somewhat usable for what I am trying to do but I was surprised to find out that such a functionality was not already built in to LabView. I thought that there would have been a relatively easy way to do it but I have not been able to find it on my own, so I thought I would put it out there and see if others had already figured it out. My search of the forum yeilded nothing. Again your help is greatly appreciated unclebump!!! Find attached code. Was written in Labview 7.1 but should be usable in 7.0 I think.
Attachments:
3dgraphof point attempt.vi ‏35 KB

How to retrieve the segment label setting of a Pie graph by java sdk?

hello,
there is a special setting for a pie graph: you can determine whether to show the segement label in a pie chart by checking the "show segment label" control under values, data, and categogy.
my question is, how to fetch the setting by java sdk?
thx.

It doesn't look like this is accessible through the SDK. Unfortunately the SDK doesn't have a lot of access to the charting component. You would want to look at the RAS SDK guide for what you do have access to.

How to print very long data series (wrap multiple XY graphs)

I'm working a data logger project where each file usually contains 5 - 10 minutes of data but sometimes may go up to 3 hours +. The customer needs the ability to print out all of the acquired data in XY charts.
If the amount of data recorded exceeds 15 minutes, printing all of the data on a single chart is not an option (granularity) so they want to print as many 15 minute chunks as necessary to cover the entire range. Ideally, they want to print out two 15 minute graphs stacked on top of each other on a landscape page. I can split the data into chunks (that's the easy part) but I need a way to create an arbitrary number of XY graphs and format/size them for mult-page print out (2 per page).
I'm looking for some ideas on how to solve this problem - any ideas are welcome as long as they involve LabVIEW and maybe Excel because it needs to be something i can integrate into the application. I can't use offline post-processing like Diadem in this situation.
Philip
CLD

Philip,
I would probably create one VI with two graphs formatted for printing. Then loop through the data, write segments to the graphs, print, repeat until all data is printed. This method allows one very simple VI to present the data for printing and allows the user control over what is printed via the calling VI. For example if they decided that 10-minute graphs were better for certain data sets than 15-minute graphs, all the calling VI needs to do is change the amount of data written to the graphs.
Write the data to a file to protect the data in the event of power failures or other unplanned events. Read it back to print if there may be too much data to keep in memory.
Lynn

I would like to know how to calculate the slope of a xy-graph in different zones of the curve. .

Is it possible to do it by graphically selecting the segment of the xy-graph curve?

I think you can incorperate Nadav's suggestion and the attached VI to find a solution. You may want to add another cursor to the xy plot to establish your region of interest for the dervative.
Jeremy
Attachments:
lv61_derivative_on_a_waveform_graph_and_xy_plot.vi ‏60 KB

Using controls to change range of multiple graphs

Hello...
I have two questions:
I have a VI with ten graphs created from a ASCII file loaded by read spreadsheet function. The first graphs shows the points 1 until 200 of X axis, the second graph the points 201 until 400 of X axis, the third graphs the points 401 until 600 of X axis........ until the end of points....
All these graphs present the same range in the Y axis
First question: is there a way to change the size of the invertals of X axis (that is 200 points in the example above), using a control? Because are many graphs, and changing the ranges one by one will be not fast...
Second question: is there a way to change the range of Y axis in all the graphs in one operation, using a control?
Thanks
Daniel

daniel.penteado wrote:
I was not able to open the files... my Labview is older than yours....
What is your version?
daniel.penteado wrote:
I use 10 graphs because I need to perform a visual inspect of the segments of the whole series. Next, I can remove some segments that present artefacts and these segments will not affect the average of the whole series.
Still, I doubt you need 10 different graphs. You could use a single graph, show the scroll bar, and let the user define the rangeboundary to be removed using cursors for example. You could also use a single graph and a suitable control to pick which range to show at any given point in time.
Anyway, here's one possible code to set the x-range. Notice that the edge elements overlap. If you don't want that, you can change the math slighly (e.g. add a -1 for the max value).
Message Edited by altenbach on 04-20-2008 10:40 AM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
Xranges.png ‏20 KB

XY graph manipulation

I am plotting an XY graph (X for time and Y for an amplitude). As i plot this graph the whole set of points are presented.
I wish i could present the graph, reducing the X axis width(10 seconds width) and iterate to plot 10 sec to 10 sec(segments of 10 seconds).
one problem is time values are not spaced uniformaly.
could do give me some hints?
thank you,

Hello Guillaume,
Thank you for contacting National Instruments.
Are you plotting the data as you acquire it in real time? Or is this data that has already been collected and you just want to plot it in 10 second increments?
If you are acquiring and plotting your data at the same time, you can use a waveform chart with the X-Axis set to absolute time format. In waveform chart properties, select the Format and Precision tab >> select X-Axis from the pull down menu >> select Absolute time from the menu below.
Then select the Scales tab >> select X-Axis from the pull down menu >> deselect the Autoscale box >> set Minimum to 0 and Maximum to 10.
The chart will now automatically scroll as points are plotted, but will stay 10 seconds wide.
If you would like to segment a currently existing array into 10 second increments, you will have to use some array functions (such as Threshold 1D Array) to split the array when the time stamp passes a 10 second mark.
If this does not help, I would be glad to take a look at your code.
Sean C.
Applications Engineer
National Instruments

XY graph response slows with dashed plot

I have an xy graph displaying multiple plots. I find that if at least one of the plots uses a dashed line as the line type, and that this plot has zero values displayed, then the response of the graph slows significantly. Redraws seem to take 5 to 10 times longer and cpu utilization goes way up. If I scroll the plot such that the zero values go past the endpoint of the x-axis, then the normal response returns. The effect gets worse with the number of dashed plots containing zero values, but seems independent of the number of zero values. Has anybody else seen this?

Since you asked so many good questions, I went back and took a harder look at the situation and I think I figured it out. I am capturing and displaying instrument data continuously as a function of time. I feed my chart with large pre-initialized (with zeros) arrays that are incrementally filled with real data from the last element forward, so that the plot line does not zoom off to the right from the last point. The x-axis is date/time. The tradeoff then is that the data to the left starts at date=0 (until the array fills). The issue is not actually that I am displaying y-values of zero as I thought at first, but that if the window on the time axis is such that the first real data point is displayed, then the plot line extends from this value left to time=0, which is a long way. Labview needs to actually compute this line to properly display the line segment from 0,0 to the first data point, but only if the first point is displayed. I think Labview has a quick method of doing this for a solid line, but that for a dashed line, it needs to compute each little dash segment and it bogs down. As it turns out, this situation will happen very seldom and I can ignore the whole issue. Thanks for the help -

Scatter plot graphs, more than 2 series possible?

It's been very difficult for me to put 3 or 4 series of data in scatter graphs and connect the dots with lines as in Excel, it just doesn't allow me. I made a graph before using line graph model but it turns out that in the x axis (which in this case is time in weeks) I need to show the distance proportionally (i.e. 0,2,6,12 and 16 weeks) and I can't find how to do it with a simple line graph. Tried in excel and is easy using the scatter plot graph (very simple, using exactly the same data arrangement). But numbers does not accept the series of data (it only accepts X,Y per series) and in second place there is not lines connecting the dots. Any of you guys have a suggestion?. I'd really prefer to use numbers bit do not why is so difficult to scatter graph the data. Thanks

The default for X-Y pairs can actually be pretty handy, though often it is not. You can easily turn it into one X and a bunch of Y's. Connecting lines are also available.
My assumption from your post is you have a column of X values and several columns of Y values.
1) All data for a scatter plot must be in "normal" data cells, none in header cells.
2) Select all the X & Y data and create a scatter chart.
3) There is a "gear" at the top left of the colored box in the table that indicates the data in the chart. Click it and choose to share X values. Now you should have one column labeled "X" and several labeled "Y" and your chart will show each Y as a separate series.
4) With the chart selected (the whole chart, not one of the series), go to the Chart tab of the inspector, go to the series tab, look for the words "connect points" and choose what kind of line you want to connect the points. Alternatively or additionally, you could make trendline curves by clicking on "advanced". Also, you can do them one at a time and choose different settings for each series by selecting each series separately.
If you have gaps in your Y data, it will not connect the points on either side of the gap, you will have a missing line segment.
If your X data is unsorted, some connecting lines may go right-to-left, not left-to-right.

Multiple Line Graph

First off, thanks to kglad for the line graph function I
started with, it has been a huge help. Now the step I'm trying to
take is 2 fold.
First, I'd like to graph more than one line segment on the
graph. Right now I am graphing functions f1 and f2, but f2
currently overwrites f1. I want them to coincide so f1 goes from
x=1 to x=15, f2 goes from x=15 to x=25, f3 goes from x=25 to x=10
at a different y (these are all curves), and finally f4 goes from
x=10 to x=1 creating a closed shape. Also, I want the x values and
the y values to be variable based on the temperature. I'm using
PV=nRT and n, R, and T are all known. so I have something like
P=nRT/V where P is y, V is X and the nRT can be calculated for two
steps of the 4. The other two steps are adiabatic, so Q=0, I don't
know yet how to fit the lines but i do know that y = a / (x^(5/3))
is a formula that works, I just need to find the proper a values
for steps 2 and 4.
Part two of this issue is that currently the graph is drawing
as the whole canvas, which is fine for testing until i get the
multiple line part worked out; however I only want this to be 1/4
of the viewing area as I have other movie clips and such to put on
this. A conceptual drawing of what I plan on making can be found
at:
http://www.students.bucknell.edu/gbement/Steps.html
I'm a novice to Actionscript and movie clips, I previously
did everything with motion tweens and nothing was dynamic. I plan
on creating the piston and molecule simulation in another movie
clip, then I can vary the play speed relative to the hot and cold
temperatures by looping the movieclip and having it play faster for
a high T and slower for a low T.
Any help on any of my many issues would be greatly
appreciated and the user will be recognized for their assistance in
my research presentation :)

Hi Arun, thanks again for the help but upon closer inspection
(along with only a basic knowledge of java and actionscript), I
think your script would need editing to work for me (editing i'm
unsure of how to do). What I'm looking for is a graph that will
create a line based on a function. Much like y=(a*b*c)/x or
y=(a*b*c)/(x^1.66) The a*b*c would be complicated also, but here's
what i've thought up on paper that I have to move to script, I hope
this is useful:
Step 1: Calculate the a*b*c
The original function is PV=nRT , nRT being the a*b*c ,
however the Thot and Tcold terms are input boxes that the user
types in before hitting the "go" button.
So I have to do this much:
tcold = Number(tcold_num.text);
thot = Number(thot_num.text);
var n:Number = 1;
var R:Number = 0.0825;
var a:Number;
var b:Number;
var c:Number;
var d:Number;
a = n*R*thot // Step 1 constant
b = // Step 2 constant (formula to be finished :-/) Looks to
be a formula using ((b) / (Math.pow(x, 1.666)))
c = n*R*tcold // Step 3 constant
d = // Step 4 constant (formula to be finished :-/)
Then I need to find a way to initialize axis to line the
graph, I can label the P and V axis using static text boxes later I
suppose.
The problem I have with yours that I don't understand is that
I could add the function into the y part of the addLine() function,
however it's noted as inity= y1 (requires a number), and the
function definition has y1:Number.
Now the issue i'm tackling below is just a newbie's lack of
understanding (i hope), but the script kglad wrote (snipped below)
will graph one line, and i can't figure out for the life of me how
to write this up to graph more than one instance without
overwritting the previous line. Again, Thanks for the help so far,
it has helped me find the points where I lacked direction and solid
ideas before.

How do I make a line graph that shows temperature readings taken on specific dates?

I need to make a chart of my wife's temperatures taken via ovulation thermometer. All I need is a line graph that shows the temperatures on the y axis and the dates the measurements were taken on the x axis.
What is the easiest way to do this? Please explain in detail as I have almost no knowledge regarding Numbers. Thanks.

You can construct a Line graph or a Scatter graph to display this.
The two are similar, but require the data to be set up differently.
A Line graph is a Category graph.
Each 'date' is a text value that names a category. The categories are equally spaced along the category axis. Measurements taken on day 1, day 2 and day 4 would be equally spaced with respect to the category axis.
Each temperature reading is a numerical value, and is represented on the graph by the distance it is placed from (and usually above) the category axis.
A Scatter graph has two value axes.
Each Date is a Date and Time value. The position of these values depends on the value itself. Measurements taken on February 1, February 2 and February 4 wound not be equally spaced. Along the Date axis, the space between the second and third dates would be twice as wide as that between the first and second cates.
Each temperature reading is a numerical value, and is represented on the graph in the same manner as in the Line graph.
Here's an example of each, using the same data set.
For the Line graph (left), the Category labels (dates) are placed in a Header column, and the temperatures in a non-header column,
For the Scatter graph, both the dates and the temperatures are in non-header columns. The Chart Inspector was used to Connect the data points with straight line segments, and the weight of these lines (and size of the data point markers) was increased to more closely match the weights and sizes in the Line graph.
Data on the graphs is not intended to have any similarity to temperatures measured for your purposes.
The construct the line graph:
Set up the data and labels as described.
Select the cells containing the data (column B in my case).
Click the Chart button and choose the Line Chart.
To construct the scatter chart:
Set up the data as described.
Select the cells containing the date and temperature data (columns A and B for mine)
Click the Chart button, and select the Scatter Chart button (third from the bottom),
In the Chart inspector, click the Series button, then set the Connection Points menu to Straight. Change the Data Point size yo 15.
Click anywhere on the line to select it, then in the Stroke section of the Format bar, set the line weight to 4 points.
Click on the box containing the dates (under the chart), then click the ruler icon in the Inspector to show the metrics inspector. Use the Rotate control to set the angle for the dates to about 75°.
Click on the label for this axis (Dates) and drag it to a position below the date labels.
Regards,
Barry

Is it normal for a waveform graph to truncate arrays of values that are longer than others when displaying multiple waveforms on the same graph?

I am reading back values of several waveforms that were saved to disk using the write to spreadsheet vi. Some of the data sets are longer than others eg. 35 seconds vs 45 seconds. All have the same sample rate.
See the code segment below. If I select the larger files first then all the data will show. If I select a smaller file first the larger ones will be truncated to the size of the small file. I am using LV 7.0.
Attachments:
codesnippet.vi ‏41 KB

I needed to make some grammatical/ nomelclature changes, But, Could not edit the previous post.
so posting again
"Thats because you are inserting into an array of a predefined size.
For ex,
When you try inseting a 1D array 'A' of 50 elements as row 1 of a 2 D array of 40 elements(in row 0 ), only only the first 40 elements will get insetred into 2 D array. You lose the last 10 elements of array 'A'
To avoid this, I suggest you use XY graph( of course you have to create an x axis with the index of each element in the inserted array and plot on xy graph).
Any doubts, do get back"
regards
Dev

How can i edit graphs on front panel?

Hello!
My problem is the following:
I need a front panel, where i can edit the graph. It doesn't need to be very complicatted. It means, there is 5 steps. For example: It will control a thermal chamber, and it should give 25 celsius for 2 hours, then cool down until 2 hours to -40 celsius, 4 hours on -40, then back to 25 celsius until 2 hours, stay there for 2 hours, up to 105 celsius until 2 hours, 4 hours on 105 , 2 hours down to room constant, stay 2 hours there. But i need to be control the levels. The temperature levels, and the time periods. It's nessesery to control this on front panel. I've found a vi , which is reading in *.lvm files with datas x,y and then it's interpolating. But it is not setable after setting.
Please help me. Thank You very much!
Solved!
Go to Solution.

If you want to specify the profile graphically then you can use cursors to do it. An old example can be found here. You may find others by doing your own search (hint, hint).
Otherwise, you can simply use a multicolumn listbox to specify the indvidual profile segments, and a graph can be used to display the entered profile whenever the listbox changes.

How can I get extract the data between two cursors on an XY graph

How can I get extract the data between two cursors on an XY graph

Well, you say xy graph, so this might be a more complicated problem.
For a waveform graph it's trivial. Simply get the two cursor indices (property: cursor index) and apply them to array subset of the data. Is that all you need?
Here's how the above code would look like. using cursor.index instead of cursor.x elimnates the need to include scaling information.
For an xy graph, there could be multiple segments (e.g. imagine a spiral that passes the desired x range multiple times from both sides). This would neeed significantly more code for a general solution.
Message Edited by altenbach on 11-24-2009 07:53 AM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
cursorsubset.png ‏17 KB

Segmentation Graphs

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