Select plot by mouse in a multi-plot graph

Hello
I'm using LV 8.5 and have a question using a waveform graph. I have multiple plots (up to about 300) in this graph and most of them will have approximately the same waveform but some will have a totally different -> the user needs to identify these plots (get the name of it when moving the mouse over it for example).
Is there a possibility to identify a specific plot in a multiplot graph?
Thanks a lot for your answer!
Rico

Hello and thanks for your answer!
Unfortunately this solution does not work, I add a picture to show the problem. If the user has to click through all plots (1500...) to get ther right one, he needs really a lot of time!
Message Edited by Osiris81 on 04-17-2008 09:45 AM
Attachments:
plotExample1.jpg ‏263 KB

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Express XY Graph Multi-plot Cursor point

Hi,
In mixed signal graph >> Property >> Cursors Tab >> Enable Allow dragging here if we select Multi-plot, it will show X scale and all Y-scale value in Cursor legend.
How can I get these same options in Express XY Graph?
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You need to use a property node and find the curser position and then plot those points in a seperate xy plot (only it will be one point instead of an array). You will still have to plot it as an array of one point.
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Hi,
I'm experiencing a problem using a multi-plot xy graph. I have to display 2 plots together, and make them appear and disappear many times during the program running.
But when I close LV and restart it, the second plot (plot1) doesn't appear, and also I lose all the properties I've set for it (name, color,...). If I don't shut down LV everything works well.
What can I do?

Stefano Moret wrote:
When you write about use property nodes, I'm using the "visible" one.
Your suggestion is to try also to set all the properties from there? Maybe it's a good idea, I'll try.
Here are some code snippets I used once to initialize the graph and later on change legend entries depending on user selection.
You can also change the way plots are represented during run time. You always have to start with ActPlot do selct one of the plots.
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Hi everyone,
I am currently working with DIAdem and I would have some newbie questions.
Call PicLoad("Template")
Call GraphObjNew("2D-Axis","2DAxis1")
Call GraphObjOpen("2DAxis1")
Call GraphObjNew("2D-Curve","New_Curve") 'Creates a new curve
Call GraphObjOpen("New_Curve") 'Opens the curve object
D2CChnYName = "GroupName/ChannelName"
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D2AXISTOP = 9
D2AXISBOTTOM = 40
D2AXISLEFT = 15
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Call GraphObjClose("2DAxis1")
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When I copy paste this twice and change the Channel Name, the previous plot is erased by the new plot. Would you know how to fix this?
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Solved!
Go to Solution.

Actually, that's my mistake.
I focused on the second post
Here an adapted version:
Call PicLoad("Template")
Call GraphObjNew("2D-Axis","2DAxis1")
Call GraphObjOpen("2DAxis1")
Call GraphObjNew("2D-Curve","New_Curve") 'Creates a new curve
Call GraphObjOpen("New_Curve") 'Opens the curve object
D2CChnYName = "GroupName/ChannelName"
Call GraphObjClose("New_Curve")
D2AXISTOP = 9
D2AXISBOTTOM = 40
D2AXISLEFT = 15
D2AXISRIGHT = 40
Call GraphObjClose("2DAxis1")
Dim o2DLineExtensions, o2DAdditionalMarker
Set o2DLineExtensions = Report.ActiveSheet.Objects.Item("2DAxis1").Curves2D.Item("New_Curve").Shape.Extensions
Set o2DAdditionalMarker = o2DLineExtensions.Marker
o2DAdditionalMarker.Type = eMarkerCross
Call PicUpdate
Are you familiar with script recording?
If not, here's the information about it:
http://digital.ni.com/public.nsf/allkb/B769AE10EDB656D28625692D00583166?OpenDocument
It can help alot when starting to write scripts.
Kind Regards,
Thierry C - Applications Engineering Specialist Northern European Region - National Instruments
CLD, CTA
If someone helped you, let them know. Mark as solved and/or give a kudo.

Charts: how do I determine when the mouse is in the plot area

I'm trying to implement logic that will do the following:
Panning plot within plot display area by clicking and dragging mouse
If the user clicks and drags in the chart plot area (the region where the chart plot actually displays, not including the axes, legends, titles, etc.), I want to be able to provide the effect of panning the plot (e.g. similar to grabbing and dragging a map in Google maps) within the plot display. This makes the most sense, of course, if the user has zoomed in to some level and the entire plot is no longer fully visible within the display.
Zooming on a plot
If the user places the mouse somewhere in the chart plot area and uses their mouse wheel, I want to be able to provide the effect of zooming in and out of the plot. The plot area itself must remain at its original size, just the representation of the plot needs to simulate the effect of being zoomed in or out on.
Thoughts, suggestions, ...
To make the zoom and pan effect, my thought was to adjust the axes bounds as appropriate to simulate these effects. The trick for some of what I'm planning on doing is finding out where the mouse is in the plot area (not the whole chart) so that I can find the x,y offsets from the plot origin (which appears to be in the upper left - at the chart level anyway). For panning, I don't think I care what the offset is, just that it's within the plot. For zooming, I may need to know where the mouse is in the plot so that the zooming could be centered on that location in the plot. This makes me think that it would also be helpful to find out how to translate the mouse x,y pixel position to a corresponding x,y value in the plot data domain.
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I experimented a bit and it seems the plot-content is the Group containing, well, the content of the plot. So in a line chart it's the smallest rectangle containing all the lines and the graphic at the data point (little circles, by default). What you probably need instead is the chart-plot-background.
Here's a quick example of a panning chart. There are probably better ways to manage the mouse dragging (it behaves somewhat badly if you drag out of the plot area and then back in, for example) but it gives you the basic idea. My original idea of adding a mouse directly to the plot area failed as the event doesn't get propagated to the plot region if you click on part of the plot content (a line, for example).
import java.util.Random;
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.geometry.Point2D;
import javafx.scene.Scene;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart.Data;
import javafx.scene.chart.XYChart.Series;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Region;
import javafx.stage.Stage;
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        final double y = event.getY();
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          lastMouseY.set(y);
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      public void handle(MouseEvent event) {
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        final double y = event.getY();
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Speaking only for myself, I am not sure about the nature of your request.
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MODDEDmixed graph cursor ex.vi ‏41 KB

LabVIEW crashes when you run a VI that contains a mixed signal graph with a multi-plot cursor.

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MixedGraphs.vi ‏15 KB

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Attachments:
multi-XYgraph.vi ‏11 KB

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Dear All,
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Attachments:
Mixed Signal Cursor.vi ‏34 KB

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Greetings from Germany
Henrik
LV since v3.1
“ground” is a convenient fantasy
'˙˙˙˙uıɐƃɐ lɐıp puɐ °06 ǝuoɥd ɹnoʎ uɹnʇ ǝsɐǝld 'ʎɹɐuıƃɐɯı sı pǝlɐıp ǝʌɐɥ noʎ ɹǝqɯnu ǝɥʇ'
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Mixed Signal Cursor.vi ‏27 KB

Multi plot cursor in Mixed Graph

If Digital waveform and normal waveform graph is plotted in a mixed graph, and if I choose watch all plots(multi plot) in cursor, LabVIEW closes immediately with an error popup dialog
I have attached the print screen image of that error popup
Attachments:
error.JPG ‏188 KB

Hi Stephen,
           I found a considerable solution to overcome that error.
           Build all the array data at first and then generate digtal
waveform in single instance.
           ie., With number of numerical array data, build a 2D array of
numerical data and make a transpose and then generate a waveform.
           It generates number of digital waveform equal to that of the
column size of 2D Array.
           Do not build generated digital waveforms. This creates an error
while using multi plot cursor--> watch--> All plots.
           I have attached the modified, bug removed Vi with this message for
your reference.
Regards,
Raja
Project Engineer
Soliton Technologies
www.solitontech.com
Attachments:
Mixed Graph Modified without Error.vi ‏25 KB

Multi-plot cursor in xy graph

I am using an XY graph with 5 curves which belong to one of two y axes each. All curves share the same array of x values. I do not like the cursor legend so I want to read out the values of the one cursor programmatically. I can create a multi-plot cursor which watches all the 5 curves but I cannot find how I can read out the 5 corresponding y values of my cursor. Any help?
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Use the cursor index property value and wire that to an index array function for each y array.

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If I plot both Analog Waveform and Digital Waveform in a single Mixed Graph, and when I choose watch all plots in cursor legend, LabVIEW crashes with an error message.....
I have also attached  the Print screen image of that Error
Attachments:
error.JPG ‏188 KB

Jared Boothe,
           I found a solution to overcome that error.
           Build all the array data at first and then generate digtal waveform in single instance.
           ie., With number of numerical array data, build a 2D array of numerical data and make a transpose and then generate a waveform.
           It generates number of digital waveform equal to that of the column size of 2D Array.
           Do not build generated digital waveforms. This creates an error while using multi plot cursor--> watch--> All plots.
           I have attached the modified, error free Vi with this message for your reference.
Regards,
Raja
Project Engineer
Soliton Technologies
www.solitontech.com
Attachments:
Mixed Graph Modified without Error.vi ‏25 KB

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I have no problem getting the readings, but when them come in, I want to index them based on their channel, which theoretically should happen by using 0 and 1 with the index command.
If this isn't possible or there is an easier way to gather readings by channel, any help at all would be appreciated.
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Thanks in advance.
Kat
Solved!
Go to Solution.
Attachments:
Keithley Thermocouple Multi Plot.vi ‏36 KB

The problem is with the array that's produced.
For this to work right, it should be a column with row 1=channel 1 and row 2=channel 2
Because of the continuous read they switch sometimes, which makes plotting them near impossible.
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Select plot by mouse in a multi-plot graph

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