How to add multiple plots programtically to XY graph.

[priyanka11]

Hello,

     I am new to Labview.My code is reading Voltage value from no. of Power supply & storing in 1D-array of string. No. of power supply will depend upon user selection. Now I want to plot all these Voltage's value to XY graph,in which X is time stamp at which  value is read & Y  is Voltage value.

        Please suggest me a solution to add multiple plots programtically according to the no of power supply, so user can have a one XY Graph with multiple plots of  Voltage's value of each Power supply.

[KateB]

[Yamaeda]

From the help:

"

Displaying Multiple Plots on XY Graphs

The XY graph accepts three data types for displaying multiple plots. The XY graph accepts an array of plots, where a plot is a cluster that contains an x array and a y array. Refer to the (X and Y arrays) Multi Plot graph in the XY Graph VI in the labview\examples\general\graphs\gengraph.llb for an example of a graph that accepts this data type."

As Kate shows, wire an array of plots.

/Y

[Ranjeet_Singh]

Better hide from the front panel. In my projects user used to had 6 plot at the maximum. Before plotting I used to ask how many parameter you want to plot. All the time I used to plot 6 plots only but visible according to parameter selection done by user.

Here is what I used to do

[Yamaeda]

Even easier is to show the Plot legend and Plot Visibility tick box. 🙂

/Y

[priyanka11]

 Thanks all of you for your reply.

All above solution are static.

    In my code  no. of power supply selection is user dependent,if user has selected 3 nos i need 3 plots in a XY graph, if 5 than 5 plots.

[priyanka11]

 I need a dynamic solution.

[thoult]

Multiple plots on an XY graph are created by wiring an array of clusters of X Y data in.

Say you have a 2D array of X data (i.e. an array of timestamp arrays) and a corresponding 2D array of Y data. You can feed those arrays into a for loop, autoindexing them, then bundle them together. Passing this bundle out and auto-indexing again will create an array of clusters of XY data to wire to the graph.

So say I've got X data and Y data for my plots, and I have 4 plots worth of data, but I only want to plot two. I use array subset to return only the first two, pass the arrays to the for loop, bundle and then plot.

[temiitopee]

Hi everyone,

I'm fairly new to Labview but I've constructed this VI. I have a problem with getting the I-V measurements from my labview VI using Keithley 6430.

The current - time measurements works fine, however for some reason, the I-V measurement just doesn't compute. Any help would be greatly appreciated please.

Cheersss