MATLAB: How can i do this

Question

i must plot a graph like this:

(there are many functions that are valid for difference particular time in a period, for example for td interval function 1 is valid, for tr interval function 2 is valid…)

a code like this is okey:

x=0:0.1:1;

a=x.^2;

y=1:0.1:2;

b=y.^3;

z=2:0.1:3;

c=z.^3;

plot(x,a,y,b,z,c);

but i have to plot these functions, there is a mistake, would you help me please ?

k=0:10.^-12:6.9*10.^-9;

a=25*10.^-6*80;

l=6.9*10.^-9:10.^-12:2.29*10.^-8;

b=25*10.^-6*l./(16*10.^-9)*(80+(2.16-80)*l./(16*10.^-9));

m=2.29*10.^-8:10.^-12:2.5*10.^-6;

c=4*2.16;

n=2.5*10.^-6:10.^-12:2.515*10.^-6;

d=4*2.16;

o=2.515*10.^-6:10.^-12:2.5244*10.^-6;

e=80*4*((1-o./(9.4*10.^-9))*o./(9.4*10.^-9));

p=2.5244*10.^-6:10.^-12:5*10.^-6;

f=25*10.^-6*80;

plot(k,a,l,b,m,c,n,d,o,e,p,f);

??? Error using ==> mtimes

Inner matrix dimensions must agree.

Answer 1

On the lines where you calculate b, and e, you probably want to use the element-wise multiplication .* instead of the matrix multiplication * between your two halves. For example:

b=25*10.^-6*l./(16*10.^-9).*(80+(2.16-80)*l./(16*10.^-9));

Also, I think you will want c,d, and f to be arrays, not scalars. For example:

c=4*2.16*ones(size(m));