New with MathCad

Are the only valid elements 1 or 0?

Cheers

Greg Locock

SIGlease see FAQ731-376 for tips on how to make the best use of Eng-Tips.

Possibly the simplest method is to use the summation and vectorize operators. Try

NumFree:=sum(vectorize(A=0))
NumRest:=rows(A)*cols(A)-NumFree

where
sum represents the vector sum operator ([ctrl]4)
vectorize(A=0) represents the vectorize operator ([ctrl]-) applied to the expression A=0, where = is the boolean equals ([ctrl]=)

ex - you are assuming that 0 and 1 are the only valid elements. The OP does not explicitly state this.

Cheers

Greg Locock

SIGlease see FAQ731-376 for tips on how to make the best use of Eng-Tips.

For instance

0 1
0 2

Has too 0s, and one 1

your method would give the wrong answer

Cheers

Greg Locock

SIGlease see FAQ731-376 for tips on how to make the best use of Eng-Tips.

Greg,

I'm guessing from the variable names that NumFree is meant to count something that is available, in the sense of 'not taken' (or doesn't cost anything!) and zero is the measure of that state. NumRest I took to be 'The rest of them' in which case, what I propose should work - count the zeros (NumFree) and take that number away from the total number of elements to get the Rest.

However, you're quite right; without a full quantification it is simply guess work.

Guys, thanks for the help. The only numbers in the matrix will be 1's and 0's.

Thanks again

Doh! My method won't work because I'd forgotten the vector summation operator doesn't apply to 2D matrices. I've attached a worksheet showing several different methods by which it could be done.