Problems with drawing diagrams in MATLAB

I'm completely new to MATLAB, and I need help with diagrams. I have to compare and draw 3 different wave equations in one diagrams. How can I do so? Or if possible can anyone send the code? Here are the equations:

1. Y1= 11.5sin((2πλ/4.97) + 63.3)
2. Y2= 14.6sin((2πλ/10.5) + 45.8)
3. Y3= 7.36sin((2πλ/4.97) + 63.3)

Answer 1

[Nithin Banka]

Refer to Hold documentation. Example:

x = linspace(-pi,pi);
y1 = sin(x);
plot(x,y1)
hold on
y2 = cos(x);
plot(x,y2)
hold off

[Khashayar K]

Well I tried this:

.
x = linspace(-pi,pi);
y1= 11.5*sin((2*sin(pi)*lambda/4.97) + 63.3);
plot(x,y1)
hold on
y2 = 14.6*sin((2*sin(pi)*lambda/10.5) + 45.8);
plot(x,y2)
hold on
y3= 7.36*sin((2*sin(pi)*lambda/4.97) + 63.3);
plot (x,y3)
hold off

But I didn't get any results, since it gave this error:

.
Error using plot
Vectors must be the same length.

Error in Untitled (line 4) plot(x,y1) end

[Nithin Banka]

The size of 'lambda' and size of 'x' must be same. Use size() function to find their sizes. Since in your case 'y1 or y2 or y3' does not depend on 'x' try changing the size of 'x'.

[Walter Roberson]

lambda = linspace(-pi,pi);
y1 = 11.5*sin(2*pi*lambda/4.97 + 63.3);
plot(lambda, y1)