How to receive output of function in variable number of arrays in MATLAB?

Question

I want to receive the output of [I_1,I_2,...,I_n] = ind2sub(siz,IND) for an n-dimensional array with size of dimensions defined in siz. The linear index is a single value in IND. I know the number of elements in each dimension of the array. But the number of dimensions is variable (it is known but variable). I want to know how to receive the output of ind2sub(siz,IND) in variable number of arrays as it needs n number of arrays to receive the output.

In fact, the number of dimensions is number of attributes of data points in a data set. If data set is called x the number of dimensions is size(x,2).

Using dynamic variable names is bad, read this answer of mine. Why don't you simply use a multidimensional array? — Adriaan
– Adriaan, Commented Sep 20, 2017 at 15:49

gnovice · Accepted Answer · 2017-09-20 16:25:47Z

1

To collect an arbitrary number of subscripted indices from ind2sub, you'll want to use a cell array instead of individual variables like I_1, I_2, etc., to store the output. You can capture the comma-separated list output as follows, assuming your N-dimensional data is in a variable x:

[indices{1:ndims(x)}] = ind2sub(size(x), IND);

And indices will now be a 1-by-ndims(x) cell array containing the subscripts for each dimension that correspond to the linear indices in IND.

edited Sep 20, 2017 at 16:25

answered Sep 20, 2017 at 15:53

gnovice

126k16 gold badges259 silver badges364 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to receive output of function in variable number of arrays in MATLAB?

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related