Deleting plot from Waveform Chart
How can I delete a plot from a Waveform chart using the chart's Attribute
Node?
Thanks!
On Thu, 23 Mar 2000 16:02:22 +0100, "Carmafresh"
wrote:
>How can I delete a plot from a Waveform chart using the chart's Attribute
>Node?
>Thanks!
>
Set the History attribute to nothing.
Regards,
Steve Drake
Similar Messages
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Only first plot of waveform chart has run-time menu
Hello again all you helpful forum-goers!
My multi-plot waveform chart is working decently well, but now for some reason only the first plot in the plot legend displays a run-time customization menu when I click on it while the VI is running (allowing me to select the plot color, etc.). All the other plots do nothing when I click on them. I do not have any mouse-down events or filter events of any kind in my VI. I programmatically set the number of plots and the size of the plot legend, along with each plot's name, y index, and color. Any ideas as to what might be going on?
Thanks a bunch as always!
-Joe
Solved!
Go to Solution.Okay, hopefully this will help get some more thoughts / answers flowing. I've copied my strip chart from my actual VI into a test VI, and it still exhibits the problem. On the other hand, I have created a new strip chart from scratch, and it works fine. I have attached both VIs here for you to see. My guess is that some property of the first chart is set incorrectly or something, but I cannot figure out which one (and there are so many!).
Any assistance you can give would be appreciated. The challenge is to get the chart in the first VI working (plots other than the first responding to a mouse click to change their color or other attributes), via changing some attribute of the chart (and being able to tell me which one you changed!).
Thank you again for anyone who can look into this.
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Attachments:
Test StripChart color selection not working.vi 17 KB
Test StripChart color selection working.vi 12 KB -
Capture Wave Form from Waveform chart
Hello,
I am trying to capture the waveform from the waveform chart save it as an image.
The reason I am not saving the data is that we have a lot of test data and we do not want to plot hundreds of waveform again manually.
Does anyone know how to do it?
Thanks!
Solved!
Go to Solution.Here's an easy way to save an image of the chart.
You can save only the chart as BMP, EPS, EMF or PICT with another method:
Jim
You're entirely bonkers. But I'll tell you a secret. All the best people are. ~ Alice -
Hi,
this must be a simple question, but I want to "fix" time axis "between 0sec and 10sec" although the running time of my vi is more than 100 sec, i.e., I want to reset the waveform chart every 10sec. Please help me out thanks.Maybe this is what you want : just configure your waveform chart to "scope chart" (right click on chart then "advanced" and "update mode")
See attached picture.
regards,
xavier
Attachments:
Exemple.jpg 90 KB -
Write data from waveform chart to excel
Hi,
I am trying to create a button that save de real time values recieved in a waveform chart. I don't know how to save it alls, because I don't know if is needed a buffer to save all or how can I do it.
It wil be faboulous if someone give me ideas!
Thanks so much for your support!
Solved!
Go to Solution.Hi mlop,
You can go through the attached VI. You will get some idea of how to do it..
Regards,
Nitzz
(Give Kudos to good Answers and Mark it as a Solutoin if your problem is Solved)
Attachments:
Untitled 2.vi 9 KB -
Get max and min values from waveform chart
Hi all
Ive got a waveform chart and want to display the max and min value for the graph. How do i get the respective values?? Im using LabView 8.2
holla
Attachments:
Untitled 231_LV80.vi 23 KBThanks Mike
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I am doing a project, but the directions for how to make the graph is for Excel. My directions say to "Right-click on the graph and click 'Select Data.' I am then supposed to delete all series labeled "Time." My graph is a scatter-plot, with no line connecting the points, if that is any additional help. How can I do this using Numbers '09? Thank you very much.
Alexa M wrote:
I am doing a project, but the directions for how to make the graph is for Excel. My directions say to "Right-click on the graph and click 'Select Data.' I am then supposed to delete all series labeled "Time." My graph is a scatter-plot, with no line connecting the points, if that is any additional help. How can I do this using Numbers '09? Thank you very much.
Hi Alexa,
A "series" refers to the data in one column (or row, depending how you have arranged your data) in a table.
For scatter charts, each series is a paired set of data in two columns, one for the X position, the other for the Y position of each data point.
Scatter plots may share the x value series, using the same column of x data in pairs with two or more columns of y data.
From your description, it's unclear to me what the instructions are asking you to do. Not the procedure, but what the data looks like 'now' and the expected change after you follow the procedure given, assuming you were using the product for which the instructions were written.
You'll find instructions for creating scatter carts on page 157 of the Numbers '09 User Guide, in Chapter 7, Creating Charts from Numerical Data.
The Numbers '09 User Guide, and the iWork Formulas and Functions User Guide, may be downloaded from the Help menu in Numbers. Both are invaluable assets when working with Numbers.
Regards,
Barry -
I want my chart to have a constant slope already plotted before it continues to start plotting the real time data.. so that I can compare my new data point to point with the ideal slope that i already have in the background
Solved!
Go to Solution.raza51 wrote:
Hi,
Thanks for help.. But this would work when i have one array and a constant "slope". What if I want to print 2 arrays of data.. means if there is an array of data instead of constant "slope"...
Since your graph is refreshed every time you go through the loop anyway, just set up the constant/reference array before the loop and feed it into the graph. That way you'll also have a full X-axis (and a Y-axis which at least includes all the reference data) for the graph already set up.
(That's twice in two days I've been scooped by a couple of minutes, I've got to get my typing speed up...)
Cameron
To err is human, but to really foul it up requires a computer.
The optimist believes we are in the best of all possible worlds - the pessimist fears this is true.
Profanity is the one language all programmers know best.
An expert is someone who has made all the possible mistakes.
To learn something about LabVIEW at no extra cost, work the online LabVIEW tutorial(s):
LabVIEW Unit 1 - Getting Started
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How to copy one plot from a waveformGraph or a chart to an other waveform Graph in run time?
Hello...
I need to copy a chart og waveform graph to another waveform graph in runtime, but its not working, I tried to copy froma chart to a graph by using the history property, but it didn't work coz it just runs the data from the chart the same way in the graph. I sort off want a standing plot from the chart to graph. or from graph to graph. it doesn't matter.
The meaning by that is that I want to check the data , by using the graph pallete and the cursor pallette.
But I can't do that if the source graph is running.
so by copieng the graphs data to another graph. i can check the data all the time i want.
I Hope someone out there Understand what I mean. My english is not that good.
Thanks.
Zamzam
HFZHi again, I maked this VI, and it works, but i cant really get the X- scale time with it, any suggestions.!
Thanks
Zamzam
HFZ
Attachments:
CopyRealTimeChart.vi 52 KB -
dear sir,
iam getting eight different plots on waveform chart with system date and time. Now i want to store this eight values with system date and time in excel file as per specified time interval. it shoould be online because i don't want to stop my vi to save that data in file. Is it possible? If yes please help me.
thanking you
falgandhaFalgandha,
this can be done with ActiveX or just saving the data as spreadsheet file and then importing it to Excel.
If you like to know more about Excel and ActiveX, you should take a look into the ActiveX-examples of LabVIEW.
Saving data as spreadsheet file is available as examples as well, but maybe it is sufficient for you to use the "Write To Spreadsheet File.vi" from the file IO palette.
hope this helps,
Norbert B.
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it. -
Plot more than one analog value to a waveform chart by reading from Serial Port
I have 4 LDRs and I want to plot their values to a waveform chart by reading them from the serial port. I have looked around and found an example of a VI plotting one value to a waveform chart (attached below) but I am unsure about how to expand this for 4 different waveforms, mostly because I don't particularly understand the way is being read currently. If someone could either point me in the way of a relevant example or explain/show me a solution, or explain howthe current VI I have works, that would be greatly appreciated.
Attachments:
LDRread.vi 20 KBSince I assume each LDR (whatever that is) has its own serial connection, you will need to read from 4 different serial ports. From there, just form an array of all the data and write to the chart.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions -
Plotting elements from an array in waveform chart
Hi all,
I am trying to plot a real time data by extracting single element from an array.
Problem is that, at some frequencies waveform chart plot perfect while at other frequencies it plots like a undersampled signals.
Any suggestions?
Attachments:
wfm.png 136 KB
wfm.vi 133 KBThe timing information comes from the data acquisition process, not the display. You should be able to get equally good display of timing information on a chart or a graph.
How many samples do you read at a time? How do you define "realtime"? Anything plotted on a graph or chart for the use of a human operator does not need to be updated more than about 10 times per second because the eye/mind system works at about that time scale. For humans a real time grahical update rate of 2 to 10 Hz is adequate. Then you will have 256 to ~51 new samples at each update.
Another issue is that both your graph and your plot have plot areas which are less than 200 pixels wide. If you supply more than [plot width] pixels to a graph or chart, LabVIEW will reduce the data to determine which pixels to plot. So your graph with 1000 X-axis values has that reduced to the 184 pixels across the width of the graph. So, regardless of the precision of the data, the "precision" of the display is limited to the number of pixels.
Lynn -
How can I change the color of plot in a waveform chart and graph?
There are 4 plots in a waveform chart, from plot0 to plot3, and I want to chang the color of plots dynamicly up to my needs when the VI is running.
For example, as show in the picture, i want to set the plot0 as RED, and plot1 is BLUE, plot2 is YELLOW, plot3 is GRAY.
If there is only one plot, i can change it's color, however when there are more than one plot, it fail.
How can I do it?
Thanks
Attachments:
waveform.JPG 61 KBHello MilkyStone,
first you have to set the active plot, then change its color (or other properties). All that is done using property nodes.
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome -
How to take the print out of the entire data from the waveform chart
i am using cont acq to spreadsheet file.vi to acquire data from a number of channels. this vi also plots the acquired data on the waveform chart. i want to take the print out of the entire data. how can i do it ?
also how can i take print out of the data between given interval??
please reply me
thank youThere are a number of different ways of achieving your goal. Depending on which version of LabVIEW you have and which development environment, the Report Generation Toolkit is a very powerful tool. Attached is an example that prints the acquired data without the use of additional toolkits.
Jonathan Hildyard
Applications Engineer
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Attachments:
DAQ_with_Print.llb 115 KB -
Saving array data from a waveform chart
I am using a CRIO 9004 and a 9237 bridge module to measure some strains from strain gauges. I've got one timed loop that reads the DMA FIFO and puts the arrays of values (16 data points, 4 per channel) into a queue. In the consumer timed loop a For loop scales the binary data, auto indexes it into arrays, then the arrays are merged into a 2D array for the four channels displayed on a waveform chart . Everytime the consumer loop runs it indexes 4 data points (per channel) yet the waveform chart plots them in a consecutive manner and doesn't overwrite the previous four. If I convert the arrays to waveform arrays I don't see anything on the waveform chart.
If I pass the 2D array of data to a array indicator inside or outside the consumer loop I get only 16 data points. I want to save the information that appears on the waveform chart after the consumer loop but because I'm not using waveform data type I can't use the write waveforms to file vi. The waveform chart history buffer has been set to 195360.
Idealy we will run the four channels for 120 seconds charting the data and saving the data. The minimum data rate is 1613kS/s (403 per channel) The data can be saved after the loops have finished gathering and processing or while they are running. I noticed when I tried to write to TDMS it slowed the consumer down. Same thing if I use a shift register with the volume of data.
I suspect I'm not sending data to the chart in the correct manner ( usualy takes two attempts to "clear chart" using shortcut menu). I'm not too familiar with timed loops /producer consumer loops and just tried to put something together based on examples.
I've attached my host vi and front panel screenshot.Hope they appear attached this time.
Attachments:
Basic DMA (Host).vi 444 KB
screenshot2.jpg 113 KB
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