Cardinal Spline graph

Post Author: sksk
CA Forum: Charts and Graphs
Is it possible to do a cardinal spline graph in Crystal 8.5? and how if possible? Thank you.

How about a simple low pass filter. Even a simple "ptbypt DC estimate" seems to work OK. Of course the data will be shifted according to the ptbypt window size, but you should be able to deal with that.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
CSAndDerivative-PtByPt_MOD.vi ‏320 KB

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Cardinal spline in Crystal 8.5

Post Author: sksk
CA Forum: Charts and Graphs
Is it possible to draw smooth line curve - Cardinal spline - between points in Crystal Reports 8.5? And how if yes.Thank you.

Hello Jennie,
Iam not remembering about 8.5. I But, Iam sure that itis possible to display image in 8.5 I have done itm, once.
Keep all the image in one folder with unique names which should be the key in database field.
eg:
employee id
I wanto to show the employee image in crystal report.
I will create a formula which will hold the image name.
d:\images\RAB0001.jpg
will be
d:\images\"tempid".jpg
Go to Insert->OLE Object
or
use BLOB object itself
Is this answers your question?
REgards
Usama MOhammad

Spline and Derivative Pt By Pt

Hi there,
I need to detect the small jumps that shows up at the end of the measured data, see the red line.
Looking at the top graph.
To do so I first fit a spline through the measured data resulting in the white line.
Finally I calculate the derivative of the spline resulting in the green line.
From that green line, one can easily find the peaks.
You may think problem solved
I would say yes in case one has the whole data at once.
I want to do the same while I receive the data point by point, the measured data I mean, the red line.
So I tried the same approach using the PtByPt vi's, but I get nowhere
See the lower graph.
Who can help me out??
Thanks !!
Solved!
Go to Solution.
Attachments:
CSAndDerivative-PtByPt.vi ‏185 KB

How about a simple low pass filter. Even a simple "ptbypt DC estimate" seems to work OK. Of course the data will be shifted according to the ptbypt window size, but you should be able to deal with that.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
CSAndDerivative-PtByPt_MOD.vi ‏320 KB

Line graph parent table child

i have a page where i have a line graph as parent and a table as its child. i want to have a master detail relationship through a view link of cardinality 1 to many.
when user selects appropriate points of line graph, the child table should refresh accordingly.
child table shows only children of firts record of line graph.
is there a problem with line graph being a parent. i could find examples which used bar / pie graph but not line graph. although i had checked the checkbox while creating graph.
i am using bind variables for both parent and child VO.
do i need to execute child VO query again to be able to display corresponding children for a parent on a line graph.
jdev 11 1 1 5

Hi,
when you create a line graph by dragging a collection (View Object) from the Data Controls panel to the page then, in the second dialog of the wizard, there is a check box "Set current row for master-detail". Check this check box and then create the table from the dependent view object. No bind variables required
Frank

Can I build a XY chart control to define a spline on the front panel

Dear LabView users,
I would like to replace a 2d numeric array control with a XY chart where the users could drag data points on the chart to create the spline of their choice. Is this possible?
best regards
Richard Elliott
Cardiff University

I think you will be better off using an XY graph and events for mouse clicks.
http://sine.ni.com/apps/utf8/niepd_web_display.display_epd4?p_guid=E64297151FA72B7DE034080020E74861

Deriving equations for cubic b-spline

For the general case where the curve contains
8 or more points, the equations to interpolate
the endpoints of the cubic b-spline can be found
here about halfway down:
http://www.cs.wpi.edu/~matt/courses/cs563/talks/curves.html
If there are only 4 points, then the cubic b-spline
basis function are the same as the cubic Bezier curve:
b[0] = t^3;
b[1] = 3 * t^2 * (1 - t);
b[2] = 3 * t * (1 - t)^2;
b[3] = (1 - t)^3;
What I want are the basis equations when there are 5, 6 and
7 points. 5 points should have 2 sets of equations, 6 points
should have 3 sets of equations and 7 points should have 4
sets of equations.
For example, for 5 points (P0 to P4)
P0     P1     P2     P3     P4
|------f(t)-----Q-------g(t)-----|Q is some derived point where the two equations
join smoothly.
Both f(t) and g(t) are of the form a*t^3 + b*t^2 + c*t + d.
Also, f(0) = P0 and f(1) = g(0) = Q and g(1) = P4. So, I
know I have to choose the constraints and put them into a
matrix and solve the matrix. Not exactly sure how to do
that though.

> What I want are the basis equations when
there are 5, 6 and 7 points.
Is this what you mean?No, for the cubic b-spline, the number of basis functions is fixed at 4.
Actually, I solved the problem by graphing the values from the N(t, i) of the general B-Spline. The graphing tool has a polynomial trendline tool that gave me the equations. Here are the equations:
          double t = ...;
          double t2 = t * t;
          double t3 = t2 * t;
          double u = 1 - t;
          double u2 = u * u;
          double u3 = u2 * u;
          if (numPoints == 4) {
               b[0] = u2 * u;
               b[1] = 3 * u2 * t;
               b[2] = 3 * u * t2;
               b[3] = t3;
          else if (numPoints == 5) {
               if (section == 0) {
                    b[0] = u3;
                    b[1] = 7 * t3 / 4 - 9 * t2 / 2 + 3 * t;
                    b[2] = -t3 + 3 * t2 / 2;
                    b[3] = t3 / 4;
               else {
                    b[0] = u3 / 4;
                    b[1] = -u3 + 3 * u2 / 2;
                    b[2] = 7 * u3 / 4 - 9 * u2 / 2 + 3 * u;
                    b[3] = t3;
          else if (numPoints == 6) {
               if (section == 0) {
                    b[0] = u3;
                    b[1] = 7 * t3 / 4 - 9 * t2 / 2 + 3 * t;
                    b[2] = -11 * t3 / 12 + 3 * t2 / 2;
                    b[3] = t3 / 6;
               else if (section == 1) {
                    b[0] = u3 / 4;
                    b[1] = 7 * t3 / 12 - 5 * t2 / 4 + t / 4 + 7.0 / 12;
                    b[2] = -7 * t3 / 12 + t2 / 2 + t / 2 + 1.0 / 6;
                    b[3] = t3 / 4;
               else {
                    b[0] = u3 / 6;
                    b[1] = -11 * u3 / 12 + 3 * u2 / 2;
                    b[2] = 7 * u3 / 4 - 9 * u2 / 2 + 3 * u;
                    b[3] = t3;
          else { // 7 and >= 8 have the same basis functions
               if (section == 0) {
                    b[0] = u3;
                    b[1] = 7 * t3 / 4 - 9 * t2 / 2 + 3 * t;
                    b[2] = -11 * t3 / 12 + 3 * t2 / 2;
                    b[3] = t3 / 6;
               else if (section == 1) {
                    b[0] = u3 / 4;
                    b[1] = 7 * t3 / 12 - 5 * t2 / 4 + t / 4 + 7.0 / 12;
                    b[2] = -t3 / 2 + t2 / 2 + t / 2 + 1.0 / 6;
                    b[3] = t3 / 6;
               else if (section == 2) { // if numPoints == 7 then section 2 gets skipped
                    b[0] = u3 / 6;
                    b[1] = t3 / 2 - t2 + 2.0 / 3;
                    b[2] = (-t3 + t2 + t) / 2 + 1.0 / 6;
                    b[3] = t3 / 6;
               else if (section == 3) {
                    b[0] = u3 / 6;
                    b[1] = -u3 / 2 + u2 / 2 + u / 2 + 1.0 / 6;
                    b[2] = 7 * u3 / 12 - 5 * u2 / 4 + u / 4 + 7.0 / 12;
                    b[3] = t3 / 4;
               else {
                    b[0] = u3 / 6;
                    b[1] = -11 * u3 / 12 + 3 * u2 / 2;
                    b[2] = 7 * u3 / 4 - 9 * u2 / 2 + 3 * u;
                    b[3] = t3;
          }

I'm trying to interpolate 8 sensor readings in a foot shaped graph.

hi,
i am trying to use interpolation of 8 different sensor readings and graph the results in a foot shaped graph. i am not sure how to do that in labview. help!!!

Ok,
I assume you want something like a map (2D) with the color to be the information, is that it ?
About interpolation, well you have many way to interpolate, the appropriate way will depend of the data type you have ; is that a 1D or 2D array ? what kind of interpolation you want ? Linear between 2 points, a spline interpolation ?...
A couple of years ago I made a VI to do "2D spline interpolation", I had a 2D map of temperature values and wanted to visualize a nice interpolated color map. If you are interested in this I'll try to dig it out.
You can also find the attached example on the "example code" part of the forums
Hope this helps.
When my feet touch the ground each morning the devil thinks "bloody hell... He's up again!"
Attachments:
2D interpolation demo.llb ‏145 KB

Graph is not getting displayed in R12

Hello folks,
Cureently m working on R12 upgrade project.
And we have a report which is working fine 12 but the graphs are not getting displayed as like 11i.
Could you plz any one help how to fix the issue.
Note: There is no error is coming up. But in the graph part , graph is not getting displayed.
Regards,
Krishna

Hello folks,
Cureently m working on R12 upgrade project.
And we have a report which is working fine 12 but the graphs are not getting displayed as like 11i.
Could you plz any one help how to fix the issue.
Note: There is no error is coming up. But in the graph part , graph is not getting displayed.
Regards,
Krishna

How can I display data gathered in a subVI in a graph of the main VI?

I have written a largish application (~50 VI's) which acquires, analyzes, display and saves data from an instrument with a built-in DAQPad. My problem is that my block diagram is rather messy by now. I'm using an event structure in my main VI which reacts to buttons being pressed on the front panel. During data acquisition (one frame of the event structure), I need to do a lot of data processing, and I'm displaying both raw data and analyzed data on the front panel. I'm using a lot of subVI's for this, but I always need to get data out of the subVI's again to display it on the front panel, cluttering my block diagram. It would be much nicer if the subVI could update the main VI's graphs and indicators. I just found two examples with control references which show how a subVI can modify e.g. a 3Dgraph of the main VI, but I'm unable to use this with normal graphs and charts - I can't find a way to update the actual data in the plots (I can scale the plot or color it blue etc - but I really want to change the data it's displaying, not color it blue). Is there anything I'm missing? Is there example code for this kind of problem?
best regards
Martin

im assuming that you want to update your graphs and indicators as you are performing your DAQ, otherwise, you can pass out your value/s when the DAQ completes.
I have attached a very simple example of using a reference to update your front panel graph.
Hope this helps.
Attachments:
Reference Example(LV7.1).zip ‏17 KB

How can I print out the graph I need only, without the controls and indicators?

I'm doing some programming in LABVIEW. I need to print out only the graph, without the buttons, controls, indicators. I tried to look for such a function in LABVIEW, but in vain. How can I achieve the result I expect in my programming?

Hi Fenny,
you should use the report generation functions to create a report containing your graph image and print it.
Take a look at the Sample Test Report.vi you find in the report examples of LV.
Just look at the part of the diagram where it is used Append Control Image to report.vi (in the center of the report functions chain); a graph reference is wired to the Ctrl reference input ( to create a reference of your graph right click on it and select create reference).
Let me know if you need more help,
Alberto

Hiding a hierarchy column in graph view

Hi All,
In an compound layout I would like to have pivot view and bar chart view.
There are two hierarchy columns in criteria. These column should display in pivot view.
My requirement is to hide the hierarchy columns in Bar chart view and can we apply separate selection steps for each view.
Kindly help me..
Thanks,
Haree

Hi,
Edit the pivot table and graph and at the below you can see the selection steps for the individual components. So that you can give separately for each of the components.
Hope this helped/ answered.
Regards
MuRam

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I noticed that cpu usage was quite high for some VIs and ended up finding out with simple comparison benchmarks (using performance and memory test) that a VI with the new silver graph runs about 25 times slower than a vi with the old, uh, modern graph at default graph size. For a graph widened to cover a wide screen, it decreased to about 190 times slower, a horrible crawl. For the test I just generated random numbers put into a 2000 element 1D array to be graphed (couldn't attach the test VIs for some reason).
The silver graph looks nice, but what in the world is going on here?
Jesse

Nice to know
Regards,
Even
Certified LabVIEW Associate Developer
Automated Test Developer
Topro AS
Norway

Regarding graph in obiee 11g

Hi All,
i have some reports that has graph. in that graphs some graph is coming and some is not coming
and giving error shown below.
Graphing engine is not responding.
A fatal error occurred while processing the request. The server responded with: oracle.bi.nanserver.fwk.exception.BISvsException: java.lang.NumberFormatException: For input string: "05:30".
i have checked the services all are up and running.
please help me to solve the problem.

Issue was, Font been defined as 7.5 (may be font size decimal not supported ).the problem solved

Rwbld60.exe error while calling a graph wizard from reports 6i.

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I have a latest patch 4f installed on my machine for reports 6i. When i call a graph wizard from my reports i am getting a program error saying "rwbld60.exe has generated errors".
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Thanks in adv.
Shailesh

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logged TARS on this and have yet to hear
back from Oracle.
Maybe if enough of us get the error Oracle
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Whenever I print PDF files from preview or from safari, some graphs print incorrectly, although they are displayed correctly on the screen. This only happens with black and white figures and either a negative image with the black and white are reversed is printed or the background of the graphic just prints as a black box. Colour elements are unaffected. This doesn't happen when printing the same files using Adobe Reader or Adobe Professional. Any suggestions for tweaking this, or am I going to have to start using the Adobe plugins instead?

Please try it on Adobe Reader version 10.1.0 , Please note that this forum is for Adobe Reader on android and not for PDF Viewer.
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Cardinal Spline graph

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