Array multiplication

[Ganesh]

Hi,

I am new to freemat. I am getting below mentioned error when I try to
multiply each elements of array by a number.

--> a = {1,2;3,4}

a =

[1] [2]
[3] [4]

--> a = a .* 2
Error: Cannot perform type conversions with this type

Can anyone help me on this? I am using freematv4.0 in windows vista.

-Thanks
Ganesh

[Timothy Cyders]

Ganesh,

the type of brackets you use is very important. When you use {, it creates a cell array, which is slightly different from a matrix. A cell array allows you to store different types of information in the same cell (for example, I could say a = { [1:10], 'hello',14}, and it would save it as  such - a double array, a string and an int. Because of this, plain matrix operations don't generally work with cells the same way they do with matrices. If you use square brackets, however, you create a plain Jane matrix (which you can do all sorts of mathematical operations with), like so:

a = [1,2;3,4]

a =
 1 2
 3 4

--> a = a.*2

a =
  4  8
 12 16

Hope this helps!

TJ

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