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# Find element in Vector

## Find element in Vector

(OP)
In MatchCad 14 I have an array with one column and 2000 rows. If I do x=min(Array) I get the minimum value. I want to know the row number of that minimum value. Is there a reasonable way to extract it?

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.

### RE: Find element in Vector

It's a bit convoluted:

k:0;rows(Array)-1 indices corresponding to the rows of Array

row[k:k -- creates a vector of row numbers corresponding to the rows of Array

lookup(x,Array,row)[0 -- looks up x in Array, and returns the value in row with the same column and row; the [0 is because lookup returns an array with a single element

### RE: Find element in Vector

Try "match(min(x),x)ORIGIN" where [ = index operator and ORIGIN is usually 0 (Mathcad default) or 1.

This will (should!) return the index of the minimum value of x

### RE: Find element in Vector

(OP)
Right after I posted, my son and his family arrived and this is the first time I've been back at the computer. I'll try these ideas once they go back to Texas.

Thanks for the help so far.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.

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