Plotting three variables

[Sjefsgjogleren]

Hello!

I am using a XY graph to plot a time series together with some measurement data. However, I want to include a third variable in the plot. This variable is a constant (straight line), but the XY graph doesn't seems to accept more than two variables? Any idea how this can be fixed?

Greetings

Kristoffer

[TiTou]

Not sure I understand what you mean, you have a plot (array of X,Y) and you also want to have an horizontal straight line on the graph?

You can either add a second plot (multiplot Xy graph) or maybe simpler to add an horizontal cursor.

[danil33]

Hi Sjefsgjogleren,

                            Have a look at this:-

                            http://zone.ni.com/devzone/cda/epd/p/id/4322

[Sjefsgjogleren]

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@TiTou wrote:

Not sure I understand what you mean, you have a plot (array of X,Y) and you also want to have an horizontal straight line on the graph?

You can either add a second plot (multiplot Xy graph) or maybe simpler to add an horizontal cursor.

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Correct. I have a plot of array (X,Y), and want to add a horizontal straight line to the same graph.

Greetings
Kristoffer

[aeastet]

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@Sjefsgjogleren wrote:

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@TiTou wrote:

Not sure I understand what you mean, you have a plot (array of X,Y) and you also want to have an horizontal straight line on the graph?

You can either add a second plot (multiplot Xy graph) or maybe simpler to add an horizontal cursor.

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Correct. I have a plot of array (X,Y), and want to add a horizontal straight line to the same graph.

Greetings
Kristoffer

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Can you post your code. This should be a real simple take to complete.

[Sjefsgjogleren]

I have attached an image of what i try to do. From the image the time series (in datatype timestamp) that is plotted together with the measurement data can be seen. I want to add third variable to the plot (the blue numeric line). I would gladly posted the whole code, but it is to big and consist of to many subVIs so i guess there is no point.

Greetings

Kristoffer

[aeastet · Accepted solution]

Without more information, here is how I would do it.

[falkpl]

The only change I would make is to make the last plot just 2 elements (min X and Max X,  horizontal Value)- this requires very little extra data in the plot.

[falkpl]

Or you can use a cursor to look like a horizontal line and move it to the location you desire.

[Sjefsgjogleren]

But, depending of the settings chosen by the user, the new variable might not be the same every time the program is executed.

Greetings

Kristoffer