So sorry, my fault. From 9 data series, I saw only 8 on my plot. But, when checking, this was because one was on top of another and not because one was white.
Thanks for the patient explanation. Heinz > On 30.10.2023, at 08:30, Federico Miyara <fmiy...@fceia.unr.edu.ar> wrote: > > > Heinz, > > I think you asked this very question in the past. I don't experience your > problem. > > According to https://help.scilab.org/LineSpec if you don't specify the color > it cycles through the table > > R G B > 0. 0. 1. > 0. 0.5 0. > 1. 0. 0. > 0. 0.75 0.75 > 0.75 0. 0.75 > 0.75 0.75 0. > 0.25 0.25 0.25 > > None of these colors is white (which would be RGB = [1 1 1]). This code > > scf(1); > clf(1); > // Create sample x and y > x = 0:0.01:1; > n = 9; > y = sin(x'*(1:n)); > plot(x',y) > > generates this 9 curve plot > <VwAj0RyYgcXmrkJQ.png> > which cycles from blue, green, ... to dark gray and starts over, blue, green. > Only 7 colors, two of them repeated. > > So I guess you have somehow assigned a different color map. In my example, > entering > > gce().children.foreground > > yields > > ans = > 33. > 2. > 37. > 36. > 35. > 34. > 5. > 33. > 2. > > If now you execute > > getcolor > > you get the following interactive color chart, > > <mvqSQ0WNATZCshJJ.png> > > which contains a sample of each color in the color map, which are indexed > from top to bottom and left to right. Clicking on any one you get at the > bottom the index and the RGB formula. Referring to the table above, the first > curve (starting from the bottom) has the index 2, which correspondes to blue, > the second has the index 33, which you can see it is the 3rd color of the 6th > column, i.e., green; then comes 5, the 5th of the 1st column, i.e., red, so > the indices are consistent with the colors of the curves and with the colors > in the color map. > > WARNING: Don't forget to close the interactive chart or else Scilab will seem > to freeze! > > Now you can force the cycling to another order, for instance instead of 2, > 33, 5, ..., 37 you could use 1, 2, 3, ..., 37. I guess you did this which by > the way can be done this way: > > gce().children.foreground = (1:n)'; > > This assigns the indices 1 to 9 to the foreground color or line color of each > curve. The problem is that, indeed, index 8 corresponds to white. One easy > way to get rid of the white is > > gce().children.foreground = [1:7, 9:10]'; > > an you'll be done! > > However, the problem of further customizing the color map is an interesting > one if you want to have complete control of your colors. You can do so by > setting a color map from scratch using gcf().color_map. You just equate it > to any mx3 matrix, where m is the number of colors, one per row, where each > row is the RGB formula of the color given by three numbers from 0 (darkest) > to 1 (most intense). > > However, if you don't have some criterion your colors may result caotic. One > way to prevent that is to use one of the color maps offered by Scilab. For > instance I like a lot this one: > > gcf().color_map = jetcolormap(n); > > They are called swatches, and you can find the available ones at > https://help.scilab.org/colormap > > Regards, > > Federico Miyara > > > > On 28/10/2023 22:45, Heinz Nabielek wrote: >> I have a vector x with --> size(x) = 13. 1. >> and an array y with --> size(y) = 13. 9. >> >> Scilab has that beautiful power that I can plot them all at once with 9 >> different colours >> --> plot(x,y,’o’); >> >> Problem only, one colour is white. >> What is the easiest way to change the colour sequence? >> Greetings >> Heinz _______________________________________________ users mailing list - users@lists.scilab.org Click here to unsubscribe: <mailto:users-unsubscr...@lists.scilab.org> https://lists.scilab.org/mailman/listinfo/users This email and any attachments are intended solely for the use of the individual or entity to whom it is addressed and may be confidential and/or privileged. If you are not one of the named recipients or have received this email in error, (i) you should not read, disclose, or copy it, (ii) please notify sender of your receipt by reply email and delete this email and all attachments, (iii) Dassault Systèmes does not accept or assume any liability or responsibility for any use of or reliance on this email. Please be informed that your personal data are processed according to our data privacy policy as described on our website. Should you have any questions related to personal data protection, please contact 3DS Data Protection Officer https://www.3ds.com/privacy-policy/contact/
