Too many output arguments with if condition, and assume

Hi

I got that error while I am using if condition with assume, so please any help.

clear all; 
close all;
clc;

syms x y;
yin=[(solve(-1500<.2500*x+.7500*y+20.78,y)),(solve(.2500*x+.7500*y+20.78<1500,y))]
% %@x=100
yin2=[-100/3 - 152003/75, 147847/75 - 100/3]
    
if assume(-2060<y & y<1938)
    display('ok')
else
    display('nothing')
end 

[per isakson]

assume doesn't return the the value that if requires

[Ali Tawfik]

Thanks for your prompt reply.

I do understand your point of view, but how could I do for this interval -2060<y <1938 All I want is to check if y is greater than left hand side which is in this case (-2060), and smaller than right hand side which is in this case (1938),

Did you get me ?

Looking to hearing from you soon as I am new to Matlab

what I want?,

Is there any suggestions from you, Hope you could help!

[Rik]

The y variable is a sym, so the test you're trying to do doesn't make sense.

Normally this should work:

y=5;
%use && for scalars
%don't enter non-scalars to if, it will probably not do what you mean
if -10<y && y<10
    disp('foo')
else
    disp('bar')
end

If you want a crash course in Matlab, you could try Onramp.

[Ali Tawfik]

Thanks, I know what you wrote, but no way to have kinda of interval inequlaities with syms ?

Thanks,

[Rik]

There probably is, but that is not what your code is doing. And I hardly ever work with syms (and I don't have the toolbox), so you'll have to google that yourself.