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5-Regular Member

## Mathcad Prime 4.0 Plotting failed. Replace complex values and NaNs by real numbers. need help- asap

Hello,

I have this problem which says Plotting failed. Replace complex values and NaNs by real numbers. Although I identified the units and the parameters. Need help ASAP please.

ACCEPTED SOLUTION

Accepted Solutions
23-Emerald I
(To:MahmoudMagdy)

Your calculation resulted in an array of arrays, that's what the square brackets around each element means.

That won't plot.

7 REPLIES 7
23-Emerald III
(To:MahmoudMagdy)

Attach your Prime worksheet, not just a picture.

Luc

5-Regular Member
(To:LucMeekes)

Okay, here it is.

23-Emerald I
(To:MahmoudMagdy)

Your calculation resulted in an array of arrays, that's what the square brackets around each element means.

That won't plot.

5-Regular Member
(To:Fred_Kohlhepp)

can you solve it and send me the file ? 'cause I didn't make double arrays in equations :S

23-Emerald I
(To:MahmoudMagdy)

I've got Express 4.0.  I was able to open your file, but I cannot program, so where you were programming values I had to pick just one (two pink highlighted expressions.

5-Regular Member
(To:Fred_Kohlhepp)

Thank you so much, really appreciate it.

25-Diamond I
(To:MahmoudMagdy)

1) Your definition of function S.J uses sigma and sigma is not a single value but a vector of values. Thats the rerason S.J returns a nested  matrix which can't be plotted.

One way round is to define S.J as a function of two arguments omega and sigma

2) In your plot you added extra units rad/s for omega when calling S.J. This is wrong as omega already has the correct units. Furthermore the axis limits you had chosen are far too big

unless you want the plot be displayed in different units

Worksheet in P5 format attached

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