Use of Arrays in Simulink

hey,

I am reading a predefined array in a constant block in Simulink which then undergoes some simple logical operations like '<','>','and', etc. the output of which goes into an 'If' block.

This gives me an error as the input to the 'If' block has to be a single value and I seem to be inputting values of the length of my original array.

Is there some kind of a work around anyone could suggest?

Thanks, Dhruv

[Azzi Abdelmalek]

Can you give an example of your array?

[Dhruv]

what I am looking to do is that I have an array of values and I need to delete some really small values from this array

say an array [10,17,12,2,9,4,21,18] and I want to remove all values below 5. So the 2 and 4 should be replaced by 0.

edit

I cannot use the Matlab function block as I need to compile my code and use it with TargetLink later.

Answer 1

[Friedrich]

Hi,

why not using a MATLAB function block with this code:

function y = fcn(u)
%#codegen

u(u<5) = 0;
y = u;

EDIT Way without MATLAB function block:

%

[Dhruv]

I cannot use the function block as I need to compile my code and use it with TargetLink later.

[Friedrich]

At least in the normal Simulink code gen area MATLAB functions blocks are supported for code gen. The above block will be transaltes to C and then get mex'ed when running the model. Is TargetLink unable to deal with MATLAB function blocks?

[Dhruv]

the matlab function block cannot be compiled in C

[Melik BEN MARZOUK]

Ommgggg thank you so much! So clever!!!!

[Keerthi Shankar]

If I want to take particular element from the array how can I take it I am trying to implement interpolation taking two constant blocks as array... Could anyone help me with this

Answer 2

[Kaustubha Govind]

Perhaps you can AND all the bits in the array together?

[Dhruv]

thanks for your answer.

The suggestion wouldnt work as I need to run the 'If' for every value in the array.

[Dhruv]

what I am looking to do is that I have an array of values and I need to delete some really small values from this array

Answer 3

[Chandrasekhar]

have u tried using an assignment block

Answer 4

[Dheeraj Kapur]

Hi, You can use a logic which I like to call the "moving" logic. You define the array in workspace, pass each of them into a decision box where if the value is less than 5 then replace it with 0; otherwise keep it same. Reconfigure the array on the other side and proceed as needed