Question
clc clear syms t u r a b c d x y j v t Output STP RMP p= input('Number of intervals of the signal (Integer value):'); n=0; a=input('Enter signal starting time:'); b=input('Enter signal function end time:'); while n = -ad, y(i) = m*(t(i) + ad); end end function y = ustep(t,ad) % generation of unit step % t: time % ad : advance (positive), delay (negative) % USE y = ustep(t,ad) N = length(t); y = zeros(1,N); for i = 1:N, if t(i)> = -ad, y(i) = 1; end end I get this error Conversion to logical from sym is not possible. Error in ramp (line 10) if t(i)>=-ad; Error in Expriments (line 20) RMP(t)=ramp(t,j,x); In general, I am trying to get output as u(t)+r(t) (ramp + step function) and I am stuck at this point.
Expert Answer
Prashant Kumar
PhD Expert
Answered Aug 26, 2026
double c=input('Enter piecewise initial value:');
That means the same thing to MATLAB as
double( 'c=input(''Enter piecewise initial value:'')') ;
which takes a character vector and outputs the vector of character codes corresponding to each character and then throws them away because of the semi-colon. This is an example of "command/function duality"
Because of this you are not assigning to c in that line so c retains its sym declaration that you started with.
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