@alex_01 

Maple is not too black a box; e.g. infolevel[Optimization]:=5 gives quite a lot of additional details.

Apart from that, there is a literature reference in the updated ?LPSolve help page:

For continuous programs, the LPSolve command uses one of two methods. The first method is an iterative active-set method implemented in a built-in library provided by the Numerical Algorithms Group (NAG). The second method is a sparse iterative interior point method developed by Dr. H. Wolkowicz at the University of Waterloo and colleagues, based on the following paper:
M. Gonzalez-Lima, H. Wei, H. Wolkowicz. "A stable primal-dual approach for linear programming under nondegeneracy assumptions." Computational Optimization and Applications. Vol. 44. (2009): 213-247.

Of course, if you really want to delve deeper into the algorithm, you can still use tracing or debugging (showstat etc.).

@alex_01 

Maple is not too black a box; e.g. infolevel[Optimization]:=5 gives quite a lot of additional details.

Apart from that, there is a literature reference in the updated ?LPSolve help page:

For continuous programs, the LPSolve command uses one of two methods. The first method is an iterative active-set method implemented in a built-in library provided by the Numerical Algorithms Group (NAG). The second method is a sparse iterative interior point method developed by Dr. H. Wolkowicz at the University of Waterloo and colleagues, based on the following paper:
M. Gonzalez-Lima, H. Wei, H. Wolkowicz. "A stable primal-dual approach for linear programming under nondegeneracy assumptions." Computational Optimization and Applications. Vol. 44. (2009): 213-247.

Of course, if you really want to delve deeper into the algorithm, you can still use tracing or debugging (showstat etc.).

Could you be more specific? What is the problem with plotting them?

Please post the code you entered so far, or upload your worksheet, so that we don't have to guess what you mean.

If I'm not mistaken, the spammer always replies to postings from 2008. Can't we lock them globally (i.e. deny any write access to these old contributions), at least temporarily?

@Wang Gaoteng

Nyquist plots can be combined like any plot type, using plots:-display like this:

NP1:=NyquistPlot(sys,range=0.1..1.9):
NP2:=NyquistPlot(sys,range=2.1..9.9):
plots:-display(NP1,NP2);

But infinity won't work as an endpoint.

@Wang Gaoteng

Nyquist plots can be combined like any plot type, using plots:-display like this:

NP1:=NyquistPlot(sys,range=0.1..1.9):
NP2:=NyquistPlot(sys,range=2.1..9.9):
plots:-display(NP1,NP2);

But infinity won't work as an endpoint.

I can't reproduce the error message. So it's probably best if you upload your worksheet (mw file) and indicate in which Maple version on which platform you run this.

Also, the conversion could be simplified as

ZValues:=convert(M,Vector);

So we don't even need ListTools. Furthermore, convert/listlist is marked as deprecated in Maple 14.

Edit: sorry, that needs to be transposed, so it's ZValues:=convert(M^%T,Vector);

Also, the conversion could be simplified as

ZValues:=convert(M,Vector);

So we don't even need ListTools. Furthermore, convert/listlist is marked as deprecated in Maple 14.

Edit: sorry, that needs to be transposed, so it's ZValues:=convert(M^%T,Vector);

Thank you - this is better than Maplets:-Examples:-KernelOpts();

Is that the same as XP Mode (guest XP 32 bit in a Virtual PC, host Windows 7)? I found it easy to install, but old applications run considerably slower than on the host OS (where applicable). Also, there is no accelerated graphics. So we usually do not recommend this approach.

Is that the same as XP Mode (guest XP 32 bit in a Virtual PC, host Windows 7)? I found it easy to install, but old applications run considerably slower than on the host OS (where applicable). Also, there is no accelerated graphics. So we usually do not recommend this approach.

If the problem doesn't supply initial and boundary conditions, you might try the symbolic version of pdsolve, which will give you some solutions (not a complete set in any way):

I haven't followed this thread closely, but supplying ICs and BCs in Maple 14's symbolic PDE solver is a new feature that I'd give a try.

If the problem doesn't supply initial and boundary conditions, you might try the symbolic version of pdsolve, which will give you some solutions (not a complete set in any way):

I haven't followed this thread closely, but supplying ICs and BCs in Maple 14's symbolic PDE solver is a new feature that I'd give a try.

Yes, it's probably an installation issue. Please check your Maple_13_InstallLog.log on Linux. If it lists any errors (including non-fatal ones; see the Summary section first), you should reinstall. This solved the issue for another customer who had reported the same error message for plots. His installer from the webstore turned out to be broken, so a fresh download fixed this.