Unresolved Error: Vector Creation

[ptc-5051640]

Hiya,

Kindly can anyone resolve error shown in the image below.

The code is simple creating a vector from random numbers. Before it was working fine, untill I added another for loop below.

Thanks and Regards

[Werner_E]

Delete the local assigment and both black stre and just leave the expression which is in red now.

[ptc-5051640]

No change, same error.

[AlanStevens]

Upload your worksheet. Mathcad's error messages aren't always very good at telling you what is wrong, and, in particular, telling you where something has gone wrong. (Have you right-clicked on the red area and chosen Trace Error?).

Alan

[ptc-5051640]

nothing is shown in trace error. Iam uploading my code.

[AlanStevens · Accepted solution]

Near the top of the program structure you have time_err with a single subscript, i, so Mathcad thinks it's a vector. Near the bottom you have time_err with 2 sub scripts L and m so Mathcad thinks it's a matrix. Get these two consistent and the program should work.

Alan

[ptc-5051640]

Thanks, but isn't Mathcad dynamically locate sizes. as in start I assigned one dimension but later

assigned two dimensions.

Regards.

[AlanStevens]

Mathcad will dynamically resize. However, once it has constructed a matrix, the next time you give it just a single row index, i, how is it to know which column to use?

Alan

[Werner_E]

It's not the double index which throws the error but the single (vector) index in the i loop when the L-loop come to L=5.

You can see this more clearly if you delete the inline evaluation of time_err. Then Mathcad shows the error at the correct place.