Error using plot vectors must be the same length

that my code i get a erro using plot 

f=(0:10);
f0=5*10^9;
k1=(100*pi/3);
k2=(sqrt(3)*k1);
c=(3*10^8);
t1=(1/f0);
t2=(1/5*10^9);
w1=(2*pi*f0);
w2=(2*pi*f);
z1=(0.75:0.015);
z2=(0.0075:0.03);
rin1=-0.71;
rin2=0.094;
%x1=rin1*cos*(w1*t1+k1*z1);
%x2=rin1*cos*(w2*t1+k2*z2);
%x3=rin2*cos*(w1*t1+k1*z1);
%x4=rin2*cos*(w2*t2+k2*z2);
y1=-0.71*cos(w1*t1+k1*z1);
y2=-0.71*cos(w2*t2+k2*z2);
y3=0.094*cos(w1*t1+k1*z1);
y4=0.094*cos(w2*t2+k2*z2);
%rin=abs(y);
plot(f,y1);
plot(f,y2);
plot(f,y3);
plot(f,y4);
%T-Γ12=1;
m=1*cos(w1*t1-k1*z1);
m1=1*cos(w2*t2-k2*z2);
%rin=abs(m);
plot(f,m);
xlabel("Frequency",'fontsize',5);
ylabel("|Γin|",'FontSize', 5);
title("Input reflection coefficient as a function of frequency","fontsize",7.5);
grid on;
since i run this code i get the erro:Error using plot
Vectors must be the same length.

Error in untitled3 (line 23)
plot(f,y1);

[Jan]

A hint: Avoid clutter. Compare:

c=(3*10^8);
c = 3e8;

Answer 1

[Jan]

The error message is clear. Use the debugger to examine the reasons:

dbstop if error

Type this in the command window an run the code again. When Matlab stops, check the sizes of f and y1.

Answer 2

[Torsten]

You can easily test what the error is.

A plot command

plot(x,y)

can only be successful if:

x is a column vector and y is a matrix that has the same number of rows as x has

x is a row vector and y is a matrix that has the same number of columns as x has.

Thus insert

size(x)
size(y)

in your code before plotting and check if one of the conditions for successful plotting is satisfied.

Answer 3

[Star Strider]

Note that ‘z1’ is defined with a +1 default increnent and with a starting value that is greater than its ending value. This means that it is already satisfied at the outset, and produces an empty value, not a vector.

The ‘z2’ assignment has a different problem, that being that it has the same +1 default increment, so it is satisfied at the first value (since the end value is less than +1 from the start value) and produces a scalar result, not a vector.

Consider using the linspace function to create all the vectors with the same desired lengths.

.