help with algorithm please

Develop M-file that can do followings

- Ask you to input the functions f1(x)=x.^2; f2(x)=x.^3; where x is -100, -99, -98........, 99, 100

- Find and plot fsum(x)=f1(x)+f2(x)

What i could come up with

ni=0

nf=100

for x=ni+nf;

f1(ni)=ni^2;

f2(nf)=nf^3;

fsum(x)=f1(ni)+f2(nf);

end

plot(fsum);

[Rik]

You should read about anonymous functions. They are perfect for this situation.

[David Wilson]

You also might want to use vectors, say something like

ni = -100:100;
f1 = ni.^2; 
f2 = ni.^3;
fsum = f1+f2

and you can plot the result.

[Walter Roberson]

input() with the 's' option, and str2func