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visits member for 1 year, 6 months
seen Jan 15 at 11:32

Jul
2
awarded  Curious
May
24
comment A simple ListPlot with different colours and a Tooltip
Many thanks. Adding Epilog as shown on the other does the job.
May
24
comment A simple ListPlot with different colours and a Tooltip
First of all, many thanks. Yes, it sounds like a static label. When I added PlotRange-> {{-0.5,1.5},{-0.5,1.5}} to see the labels, the size of the points have changed. Is that right? One final question - How can this solution be used inside Manipulate (y-values will change according to some rule) where only the plot is shown?
May
24
comment A simple ListPlot with different colours and a Tooltip
Yes. The first and the fourth have the same colour; the second and third point have the same colour but different from the previous set of points and finally the fifth point has a different colour when compared to the other two set of points.
May
24
asked A simple ListPlot with different colours and a Tooltip
May
21
comment Problems with RootLocusPlot
PlotPoints=7000 and MaxRecursion=15 (more than that, Mathematica sends a warning on my mac) are not enough to get rid of the distortion. The number of PlotPoints can be increased but the results take longer to show up. As for the distortion, it seems that increasing the Maxrecursion does the job. Many many thanks.
May
21
comment Problems with RootLocusPlot
Just a comment - if you change the limit of k from 0.99 to 0.99999, and from 1.01 to 1.00001, the entire real axis is covered by the loci.
May
20
comment Problems with RootLocusPlot
Many thanks. It worked but I am not happy with the noise (I used thickness[0.02] to see that the entire real axis is covered by the loci - that is not true unless we have negative gains - which we don't). How to get rid of this noise? As for a) p2 gives me a distorted circle that does not seem right.
May
20
comment Problems with RootLocusPlot
Many thanks. What you wrote it is what I got by hand but I cannot see that on the result of RootLocusPlot. a) There is no blue loci coming from -infty (I have tried changing the range of k and etc but no show) and b) There seems to be a loci between pole at 1 and zero at 2, and between zero at 2.5 and pole at 4 (it should not be there). Another point: how to use ListPlot in this case?
May
20
asked Problems with RootLocusPlot
Feb
19
comment Strange behaviour of OutputResponse
Thanks for pointing out various options. The help pages on Mathematica documentation do not seem to cover any of them.
Feb
19
comment How to adjust the parameters on a Nyquist Plot?
Many thanks - I have noticed that one has to be very careful when using the functions on the control package.
Feb
5
comment Strange behaviour of OutputResponse
@Daniel - Many thanks. That seems to work. I am puzzled at how to use the functions that comes with the Control Package. Something as simple as closing the loop and then calculating the output response can lead to the problems I am experiencing.
Feb
3
accepted How to fix BodePlot that comes with Mathematica?
Feb
3
awarded  Scholar
Feb
3
accepted How find the first element of a list greater than zero (or another criterion) when there is a symbol in the list?
Feb
3
comment Strange behaviour of OutputResponse
Many thanks for pointing that out.
Feb
3
comment Strange behaviour of OutputResponse
Funny the results in MMA v8 are definitely different from those of MMA v9 (even if I use or don't use CHOP). It is getting more and more difficult to accept the results that come from the Control Package. Forget mention that if I do not use CHOP on v9 the output is huge with lots and lots of 10ˆ(-15)
Feb
3
comment Strange behaviour of OutputResponse
Many thanks. Notice that b) contradicts zero as the response of the system to an unit step. Regarding a) Have you noticed that the response vanishes after 0.3 secs. That does not suppose to happen. And yes, the system is unstable but that does not mean one can not calculate the output response.
Feb
3
comment Strange behaviour of OutputResponse
Many thanks. Out of curiosity what version are you running? The reason for the question comes to the fact that I have got the same results as the ones you have shown in your reply when I run Mathematica Version 8.0.4 and issue the exact same command as the one in my question.