extracting subset array from a cell array

Question

回答： Ameer Hamza 2020-4-29

I have data with multiple values at each location x y z. I have stored this as a cell array as follows.

DataPoint{x,y,z} = [V1, V2 , V3, V4, V5, V6];

DataPoint{2,3,4}(1) works to extract the value V1 at point 2,3,4.

I want to extract the values of V1 for all the points as a 3D array.

valuesV1 = DataPoint{ :, :, : }(1);

gives the following error: "Expected one output from a curly brace or dot indexing expression, but there were 1000 results."

1) everything is numeric, is there a different structure other than cell array that would be better?

2) what is the correct syntax for this?

3) should I just make a loop to do this or would that be slower?

Answer 1

Ameer Hamza 2020-4-29

Use cellfun()

valuesV1 = cellfun(@(x) x(1), DataPoint);