seperating integer values using if block in simulink

1 view (last 30 days)
I have integers [1 2 3 5 6 7 8 9 10] and function f(x) and g(x), I specified those ingeters in a constant block labled x. In the command window I specified x=[1 2 3 4 5 6 7 8 9 10]. another variable y is specified as 5 in the command window, y=5. For integers x=>5 function f(x) is computed and for integers x<5 function g(x) is computed. I used the if block to perform this condition. when i run the simulation this error comes up.
Error in port widths or dimensions. Output port 1 of 'model/constant,x2' is a one dimensional vector with 10 elements.
i think the if block could not take all the values at the same time.
how do i go about this? is there any other way to do this?
thank you. your guidance is very much appreciated.

Accepted Answer

Raju Purohit
Raju Purohit on 4 Nov 2012
I cannot be sure unless you post your model but I think the problem arising in your model is by this: in the block parameters of "If block" under "If expression", you have used u1 >= 5 (ie., x >= 5) which is incorrect. x is a vector with the order 1x10, while on the right hand side is 5 which is a 1x1 integer. MATLAB cannot compare the two dimensionally mismatching variables.
Instead, you need to use u1(i) >= 5, where i can be anywhere between 1 and 10, in which case u1(i) will be a 1x1 variable and can be compared to 5.
Hope this helps.
  3 Comments
kumaresan
kumaresan on 21 Nov 2012
your guess is correct. I do want to send 10 integers 'one by one' and make the "if" block work accordingly. I want the if box to send the integers to the block based on my conditions which is >5 and <5. so what i want is for the 'if block' to recognise the integer, then if the integer is more then 5, it is sent to a subsystem and if its less then 5 its sent to another subsystem for further calculations. For starters I'm only using 10 integers later on i will use more integers.

Sign in to comment.

More Answers (0)

Tags

Products

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by