To convert 2D Array of double complex to 2D Array of double 64 bit real

[Nghtcrwlr]

Hello

I am having a 2D array of double complex numbers which i have to plot an intensity graph. Now i create property node to scale the Z scale with the maximum and minum range. See the attached VI. There is a clash between the type .... how ist possibel to convert them?

Thanks

[Yamaeda]

Under Numeric->Complex you have Complex to Re/Im

I think it'll solve your problem

/Y

[Nghtcrwlr]

Hello Yamaeda

Actually what i needed was to get the magnitude of the complex number to be plotted.

So changing it to re/im wont work.

is there any other option to scale the graph?

[smercurio_fc]

You don't need another option. If you just want to plot the magnitude then pipe your complex value into the Complex to Polar function. This will give you magnitude and phase. Magnitude is a 2D array. To get the min/max of the values for your Z-scale simply wire it to the Array Min/Max function.

[altenbach · Accepted solution]

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smercurio_fc wrote:
If you just want to plot the magnitude then pipe your complex value into the Complex to Polar function.

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Since you only need the magnitude (and not the phase) use the absolute value function on the complex 2D array. It is slightly faster because it is simpler and gives the same result. 😄

Message Edited by altenbach on 03-04-2009 11:26 AM

[smercurio_fc]

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altenbach wrote:

It is slightly faster ...

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Really? Interesting. I can't say I ever benchmarked it. Is this specific to a LabVIEW version?

[altenbach]

I specifically studied this (and more) in detail very long ago. It certainly requires less internal code, because it does not need to calculate the output for Q. 🙂

(I don't know if the newest LabVIEW versions changed things, but I doubt it.)

[altenbach]

Actually, the two options look pretty similar in performance these days.

[Nghtcrwlr]

Thank you evry one!! both ways wrked....