Hello,
I recently updated from Mathcad 15 to Mathcad Prime (8.0) and am having a problem with certain worksheets that contain a specific type of program. Specifically, programs where the calculation is dependent upon elements from the output vector that should already have been calculated. ie
x[i = x[(i-1) + y[i
(sorry for the notation - can't work out how to get subscripts on this forum).
I have attached a simple example worksheet of the problem. Is this type of self-referential programming no longer possible. If so can anyone suggest a work-around?
Apologies if this question has been asked and answered already. I had a look using the search function but was not able to find anything obvious. Many thanks for any assistance.
Ian
ACCEPTED SOLUTION
Accepted Solutions
I can confirm that the behaviour is different from the one in real Mathcad 15. You may consider reporting it to PTC as being a bug.
As a workaround you could do without the range i using a for-loop. So you could just copy the old program in place:
The initialization could also be done directly without the if-statement and in your case there is no need to distinguish between i=1 and i>1
In case you have an example where the second value (i=1) also differs from the rest. you initialize with the appropriate vector and start the loop with 2
If you really want to use a worksheet range, you would have to do the initialization explicitly first and use a range starting just from 1.
EDIT: Another option, which I won't recommend, could be to turn the existing program into a recursive function and call it using the range i
I don't have P8 installed so the attached sheet is in P9 format. But you should see all thats needed in the pics anyway.
I can confirm that the behaviour is different from the one in real Mathcad 15. You may consider reporting it to PTC as being a bug.
As a workaround you could do without the range i using a for-loop. So you could just copy the old program in place:
The initialization could also be done directly without the if-statement and in your case there is no need to distinguish between i=1 and i>1
In case you have an example where the second value (i=1) also differs from the rest. you initialize with the appropriate vector and start the loop with 2
If you really want to use a worksheet range, you would have to do the initialization explicitly first and use a range starting just from 1.
EDIT: Another option, which I won't recommend, could be to turn the existing program into a recursive function and call it using the range i
I don't have P8 installed so the attached sheet is in P9 format. But you should see all thats needed in the pics anyway.
