## 1201 Reputation

17 years, 198 days

## try this...

I changed some things, not sure what did the trick in the end. But mixing up floats and rationals can cause problems, sometimes.

restart;
T1 := piecewise(x<0,0,x<20,(1/3)*((7/2)*x*13)+13,x<30,13*(34*(1/10))*x*(1/3)+13, (1/3)*((13/4)*x*13)+13);
plot(T1,x=0..40,numpoints=1000,discont = true);

try2.msim

## Spring...

Why don't you use a spring component ? Or could you describe what you are trying to model ?

## Fraps...

I don't think there is a built in export feature for this yet, but you could try a 3rd party recording tool like fraps:

http://en.wikipedia.org/wiki/Fraps

alternatives:

http://en.wikipedia.org/wiki/List_of_screencasting_software

## Steps:...

Run your model, select the project tab -> stored results. Right cklick on result -> Export

This will export your probe data in csv or xls format.

## try this...

restart:
kappa:=6*log(R)/R^2:
p1:=plot([kappa,R,R=.99..1.6]);
p2:=plot([kappa,R,R=1.6..6],linestyle=dash);
plots[display](p1,p2);

## Could you give an executable example ?...

If you have a function f then you can write

f:=x^2+a*x+b;

solve(f,a);
isolate(f,a);

The former gives the result term, the latter gives an equation back. So, it is not a biggie. There may be other minor differences, i'm sure you already read the FM :-)

## well...

Maybe you need the zeros of the second derivative ?

By the way, you need to write 10.0 instead of 10,0

And write exp() instead of e^

## Have a look...

restart:
f:=x^2+b*x+3*b;
L:=seq(f,b=-5..5):
p1:=plot([L],x=-10..10,y=-20..20):
p2:=plot([-b/2,-1/4*b^2+3*b,b=-10..10]):
plots[display](p1,p2);

## A taylor approximation is only valid for...

A taylor approximation is only valid for a small area around its development point. Your plot is probably messed up because the default plotting range for the z axis gets into the millions. Set it to reasonable values and you'll see the real thing. Why not just integrate with the numeric option ?

## Anyhow you messed up your sheet. Select ...

Anyhow you messed up your sheet. Select your line with x:=... right-click -> convert to-> 1D input, and you see what's wrong with it (remove the redundant brackets).

## ideas...

Don't get your hopes high for general multicore support, only some commands take advantage of it. Maybe you have a full hard disk ? Also, i would start the task manager to see which processes eat resources. By the way, Maple installs its own Java environment, so another global Java update shouldn't affect performance.

## Why not move the diff operation into min...

Why not move the diff operation into min, like

diff(x*lambda,lambda);

df:=min(%,0)

plot(df...)

## display...

Make something like

p1:=plot(function);
p2:=listplot(pkt list);
plots[display](p1,p2);

## Slightly modified for eye candy:...

Slightly modified for  eye candy:

f:=(1-k)^2*x^2+k*sin(x);
plots[animate](plot, [f,x=-10..10,y=-1..5],k=0..1,frames=150);

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