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gkdlgod20001-Visitor
1-Visitor
Mar 9, 2015 3:10 AM UTC
Question

This array index is invalid for this array

I use mathcad program.

I want to have "sys_r" graph.

I try a below captured programming.

But programming error occurred.

programming error!

Error is "This array index is invalid for this array."

I don't know solution.

Please help me.

zxczxczxc.JPG

graph shape example !

14124.JPG

5 replies

ValeryOchkov24-Ruby IV
24-Ruby IV
Mar 9, 2015 8:18 AM UTC

Try please ORIGIN:=1

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    AlanStevens19-Tanzanite
    19-Tanzanite
    Mar 9, 2015 8:54 AM UTC

    Mathcad counts from 0 by default. Because you set j = 0..2, and you have a 3x3 matrix with elements numbered from 0,0 to 2,2, when j = 2 then j+1 = 3, and there is no element with a j index of 3. Simply setting ORIGIN to 1 (so Mathcad counts from 1 instead of 0) won't cure this as you use both j+1 and j in the routine, so if ORIGIN = 1, you can't have j = 0.

    If you correct this, you will have a problem with index i, as this runs from 1 to 3.

    Alan

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      gkdlgod20001-VisitorAuthor
      1-Visitor
      Mar 9, 2015 12:40 PM UTC

      Thanks you.

      I clear the error.

      But I don't draw a graph.

      12.JPG

      Different from the example graph.

      I want an example graph

      I want to have a hint to draw an example graph.

      I ask heartily. Plzzzzzzzzzz...

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      Fred_Kohlhepp23-Emerald I
      23-Emerald I
      Mar 9, 2015 2:35 PM UTC

      An example of how to plot a vector against its index.

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