I have a array of 1X45 double .I have to rearrange and copy into another array. First four values to 1st row, next 4 values to 2nd row and so on

I have a array of 1X45 double .I have to rearrange and copy into another array. First four values to 1st row, next 4 values to 2nd row and so on

[José-Luis]

45 is not divisible by 4.

[Prathusha Reddy]

it is first 5 values

[Prathusha Reddy]

can I use reshape

Answer 1

[Andrei Bobrov]

a = 1:45;

reshape([a(:);nan(mod(-numel(a),4),1)],4,[])';

[Prathusha Reddy]

Yes Its working thank you

[Prathusha Reddy]

Sir can u please explain how this is working what does nan do in this expression

[Walter Roberson]

The mod() expression figures out how many values need to be added to bring the total number of values up to a multiple of 4, and the nan() part of it says to create a vector that many elements long each element of which is nan (Not A Number). The effect of the code is to pad out the array to be a multiple of 4 long, by adding as many nan on the end as needed to make a multiple of 4.

[Prathusha Reddy]

thank you

Answer 2

[Walter Roberson]

If you have the signal processing toolbox, use buffer()