How to locate a decimal in a matrix?

Question

Jose Grimaldo 2019-10-19

回答： Star Strider 2019-10-19

How would i locate a decimal value inside a square matrix?

For example x=[1 2.5 3;5 7 1;2 6 4.2]

Would i used functions like mod and find?

James Tursa 2019-10-19

A specific decimal? Any non-integer value?

Answer 1

Star Strider 2019-10-19

It depends on what you want. If you want the indices, use both. If you want the values, just rem (or mod) will work.

Try this:

x=[1 2.5 3;5 7 1;2 6 4.2];
Lm = rem(x, 1) ~= 0
Out = x(Lm)

producing:

Out =
          2.5
          4.2

To locate their row and column indices:

[r,c] = find(Lm)

produces:

Experiment to get the result you want.