Must be a vector

[ELSID]

Using MathCAD 14 M020
I am attaching an example file that is NOT erroring out.
I have another calculation where I define P.f[1:4 (written how typed).
After a certain point in the calculation, the value errors out and says that the value must be a vector! Any suggestions on how to fix?

[RichardJ]

Not without seeing the one that doesn't work.

Richard

[TomGutman]

Fix what? You posted a perfectly good sheet, no problems in it. Obviously you made some mistake in your sheet with the error. In this context it is highly unlikely that it represents a bug in MC14 (the purpose of this section).

The error usually means that you have used a single subscript on a value that is not a vector (either a scalar, that takes no subscripts at all, or a matrix, that requires two subscripts). Fix either the value or the subscript, whichever is wrong.
__________________
� � � � Tom Gutman

[ELSID]

Tom,

On the sheet with the error (will try to eliminate superfluous items) I need to carry the argument. As I head down the calculation, the argument is *lost* I've Deleted most of the file not related to the error. Please see the LAST Page to the right of the sheet.

[IRstuff]

On 3/23/2009 3:00:43 PM, ElSid wrote:
>Tom,
On the sheet with the
>error (will try to eliminate
>superfluous items) I need to
>carry the argument. As I head
>down the calculation, the
>argument is *lost* I've
>Deleted most of the file not
>related to the error. Please
>see the LAST Page to the right
>of the sheet.

There is no Mathcad bug or error.

You redefined the variable in the text block to be a scalar with the summation.



TTFN,
Eden

[ELSID]

Fair enough.

I need to sum up some items and retain the vector. How do I do that?
The vector value is used as a variable for another equation later in the calculation 🙂

[RichardJ]

On 3/23/2009 3:28:50 PM, ElSid wrote:
>Fair enough.
I need to sum up
>some items and retain the
>vector. How do I do that?

Assign the sum to a different variable.

Richard