Change data type in matlab

Hey,

I'll present my question with an example.

I create parameter: x=1; now we have the possibility to see in workspace, among many others, the class of this parameter which automatically will be 'double'.

I have this parameter in a Simulink model, where I use it as an int8. Next I want to determine the byte size for this parameter x.

But the problem is that in Matlab workspace the data type of parameter x is double. I need to change the class from double to int8 (adapt it as in the Simulink model).

How can I do this considering that x=1 is in workspace as a parameter and I have another 2 variables: var_param_name=x (type char) and var_data_type=int8 (type char). I managed to obtain these 2 variables from workspace with find_system command.

Thanks! Diana

Answer 1

[Acreala Anca]

So you have a = 1 in you workspace which is a double. You also have b = 'int8' which is a char.

I think you can use the eval command which will execute a string command. So this means that you have to create your command as a string.

c = strcat(b,'(',int2str(a),')')

This will actually store into your workspace a 'c' string with the value:

c = 'int8(1)'

Now you can simply pass this string to the eval command.

So a = eval (c), and there it is:

a = 1, as an int8. :D

Good luck!

Anca Acreala

[Diana Acreala]

Thank you very much for your help!! :D

Answer 2

[Kaustubha Govind]

Not sure if I understand your question correctly, but to create an int8 value in MATLAB, you simply need to use:

    >> x = int8(1);

Answer 3

[Diana Acreala]

I need to use the two variables: var_param_name=x (type char) and var_data_type=int8 (type char); Can't do x = int8(x); directly...