Re: error: operator -: nonconformant arguments (op1 is 3x1, op2 is 10x1)

[James Sherman Jr.]

2011/11/11 ishi soichi <address@hidden>

I have been trying to debug it... ;)

If I put "keyboard" near the line of the error and execute it, it
seems to complete the loop (it generates "keyboard" iteration times).
But once it gets the part producing the solution, it gives the error...

soichi

2011/11/12 Jordi Gutiérrez Hermoso <address@hidden>

On 11 November 2011 20:29, ishi soichi <address@hidden> wrote:
> my code generates an error
> error: operator -: nonconformant arguments (op1 is 3x1, op2 is 10x1)
> error:   /Users/xxx at line 133, column 9
> which is at
> delta_3 = a_3 - yy;

I recognise this as code from the machine language course, so I know I
can't ask you to share code yet so we may understand what is going
wrong. My suggestion then is to try to debug your code. For example,
write "keyboard" near the line where the problem occurs (make sure you
have the right line) and make sure the sizes are what you think they
are. Also try to write in debug mode the code that seems to be
failing. Write "dbcont" or "dbquit" to get out of debug mode.

HTH,
- Jordi G. H.

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For debugging problems like these, I usually do something like

if size(a_3,1) == size(yy, 1),

    delta_3 = a_3 - yy;

else

    keyboard;

endif

Then if it executes the keyboard command, you know it would be when you'd have your problem (especially when it sounds like this bit of code is in a loop, which may not trigger the error everytime).  Then you can go about debugging and seeing what the other variables are at the time when the error would have occurred.

Hope this helps.