MATLAB: How to plot the function

plot s

I am trying to use Matlab but I don't remember basic functions. Could anyone help why Matlab couldn't plot this code?

for n=1:20
for i=-1000:1000
x=i/1000;
u=(((2*(-1)^n))/(n*pi))*((6/((n^2*pi^2)^3))-1)*sin(n*pi*x);
hold on
plot (x,u);
end
end

Best Answer

You are plotting with scalar u and scalar x. Remember that you need to plot() with at least two adjacent real-valued coordinates in a single call in order for MATLAB to draw a line.

for n=1:20
  i=-1000:1000;
  x=i/1000;
  u = (((2*(-1)^n))/(n*pi))*((6/((n^2*pi^2)^3))-1)*sin(n*pi*x);
  hold on
  plot (x,u, '-*');
end

Related Solutions

MATLAB: HOW SHOULD DRAW THIS IN LOOP FORM? WHERE IS THE PROBLEM IN MY CODE

finally i could write the correct answer! hahaha

tnx guys for pushing me lonely!

x=linspace(-5,5,1000);

s=0;

for n=1:1:10000

p=((-1)^(n+1)*sin(n*pi*x))/n;

s=s+p;

end

f=(2/pi)*s;

plot(x,f)

MATLAB: How to plot 2D graph

If I understand correctly what you want to do, this should work:

for t=1:20
    for x=1:20
        Sum=0;
        for n=1:100
            Sum=Sum+(30/pi)*(1/n)*(exp(-(n^2)*(pi^2)*1.14*t/3600))*(1-cos(n*pi/2))*(sin(n*pi*x/60));
        end
        accsum(x,t)=Sum;
    end
end
figure
meshc((1:20),(1:20),accsum)
grid on
xlabel('x')
ylabel('t')
zlabel('F(x,t)')
view(-130, 30)

Best Answer

Related Solutions

MATLAB: HOW SHOULD DRAW THIS IN LOOP FORM? WHERE IS THE PROBLEM IN MY CODE

MATLAB: How to plot 2D graph

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