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st0812

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7 years, 231 days
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These are questions asked by st0812

Optimization/LP...

st0812 15 Maple
optimization shifting
March 14 2018
1 2

Can Maple solve the chief or nurse shift problems? 

sensitivity after a comma...

st0812 15 Maple
numeric
March 13 2018
2 1

I just want to get 3 digits after the comma. I wrote something random, but I could not find the right one.What exactly do I have to write when I click on the custom?

How can I graph equation?...

st0812 15 Maple
homework plot3d plotting
December 07 2017
1 7

u:=(x,t)->Sum(sin(r*Pi*x/20)*(4/(r^2*Pi^2))*sin(r*pi/2)*cos(r*Pi*t/20),r=1...1000);

plot3d(u(x,t),x=0...10,t=0...1);

When I want to draw the graph, it gives a straight line. But this is a wave equation

2D Wave Equation Plot3d...

st0812 15 Maple
sum homework plot3d
December 06 2017
1 4
lambda:=unapply(5*Pi*sqrt((m^2)/16+(n^2)/4),m,n):'lambda[m,n]'=lambda(m,n);
                     
 u:=(x,y,t)->0.426050*sum(sum((1/(m^3*n^3))*cos(lambda*t)*sin(m*Pi*x/4)*sin(n*Pi*y/2),m=1..infinity),n=1...infinity);
 
lambda value depends on m and n. m and n are odd numbers. We write 2 * m-1 and 2 * n-1 instead of m and n. x = 0: 0.01: 4 and y = 0: 0.01: 2 and t = 0.01.
How can I draw a 3D plot? Where do we  write 0.01 in increments of amount?   in the Grid command?Or how do we plot for the direct x = 0 ... 4 and y = 0 .... 2 and t = 0.01?
 
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