Vectors must be the same length.

%Signal generator code
disp('Welcome to our signal generation simple application')
sf= input('Please enter sampling frequency:');%sampling frequency
start= input('Please enter signal start point:');%start point
ending= input('Please enter signal end point:');%end point %end is a key word so we couldn't use it as a variable
bp= input('Please enter number of break points');%break points
bpvec=zeros(1,bp);%breaking points vector
if bp~=0
    t=linspace(start,ending,(ending-start)*sf);
    for i=1:1:bp
        bpvec(i)=input('please enter the position of the breaking point');
        t1=linspace(start,bpvec(i),(bpvec(i)-start)*sf);
        type= menu('type of the sigal partition','Impulse signal','DC signal','Ramp signal','Exponential','Sinusoidal');%type of each partition
        switch type
            case 1
                area=input('please enter the area');
                x=zeros(1,length(t1));
                x(1)=area;
                y1=x;
            case 2
                amp=input('please enter the amplitude');
                x=amp*(ones(1,length(t1)));
                y1=x;
            case 3
                slope=input('please enter the slope');
                intercept=input('please enter the intercept');
                y1=slope*t1+intercept;
            case 4
                
                amp=input('please enter the amplitude');
                ex=input('please enter the exponent');
                y1=amp*exp(t1*ex);
            case 5
                
                amp=input('please enter the amp');
                freq=input('please enter the frequency');
                phase=input('please enter the phase');
                y1=amp*sin((2*pi*freq*t1)+phase);
        end
        start=bpvec(i);
        if i==1
            y=y1;
        else
            y=[y y1];
        end
        y=[y y1];
    end
else %if no break points
        t=linspace(start,ending,(ending-start)*sf);
                type= menu('Impulse signal','DC signal','Ramp signal','Exponential','Sinusoidal');%type of each partition
        switch type
            case 1
                area=input('please enter the area');
                x=zeros(1,length(t));
                x(1)=area;
                y1=x;
            case 2
                amp=input('please enter the amplitude');
                x=amp.*(ones(1,length(t)));
                y1=x;
            case 3
                slope=input('please enter the slope');
                inttercept=input('please enter the intercept');
                y1=slope*t+intercept;
            case 4
                
                amp=input('please enter the amplitude');
                ex=input('please enter the exponent');
                y1=amp*exp(t*ex);
            case 5
                
                amp=input('please enter the amp');
                freq=input('please enter the frequency');
                phase=input('please enter the phase');
                y1=amp*sin((2*pi*freq*t)+phase);
        end
        y=y1;
end
    plot(t,y)

[Walter Roberson]

please show the complete error message

[youssif wahdan]

Error using plot.

vectors must be the same length

error in miniproject1 line 82

plot(t,y)

[Walter Roberson]

what is the

sequence of inputs that trigger the error?

Answer 1

[madhan ravi]

plot(t,y(1:numel(t)))
%or
plot(t(1:numel(y)),y)

Answer 2

[Walter Roberson]

You have

        if i==1
            y=y1;
        else
            y=[y y1];
        end
        y=[y y1];

Every iteration of the for i loop, that adds y1 to the end of y twice, so y will be length 2*bp . But you have

        t=linspace(start,ending,(ending-start)*sf);

which is a length that is unrelated to bp.