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Dear all,


I am tryong to use the density plot for the first time.

Following maple instructions in maplsoft, I type 


but I get the error below:

Error, (in plot/options2d) unexpected option: colorscheme =["π™±πš•πšžπšŽ","π™Άπš›πšŽπšŽπš—","π™Ύπš›πšŠπš—πšπšŽ"])

It actually works with one color, but not with colorscheme!


Is there a way to permanent change the color of the output in maple?

Well, long story short. Sat in class, got bored. Began thinking of how to plot different figures in maple.
This eventually leading to that of a rainbow. Anyone got a formula or something i can use to create one? :-)
Thanks ahead. :)

When assigning a color to a given wave length I initially used ColorTools WavelengthToColor. Acer commented that this wasn't the most accurate. I looked into this a little further and it seems there could be a better result. The attached document compares some different ways of assigning colors to wave lengths. 

Warning- The CIEDE2000 computation for deltaE is very slow. I think this is because of the hue angle calculations which use piecewise a lot. The CIE94 delta E method produces nearly the same result and takes minutes instead of hours.



 I think I could speed up my calculation if I could find the position of the minimum element of an Array similar to FindMinimalElement of a list. 

I created my own atan2 function (similar to Excel). If there were a built in Maple equivalent perhaps it would be faster? I didn't see any such function.

The downloaded worksheet below displays 3 points on the unit sphere which define a solid angle with a triangular face. The sides of the solid angle's are red arcs on the surface of the sphere and red radii which outline the planar sides within the sphere.

Three questions:

1. Is there a way to make the surfaces of the solid triangle more apparent by filling them with color?

2. Is there a way to calculate the area of the face on the surface of the sphere?

3. Is there a way to calculate the volume of the solid triangle?


Download Mechanics;

How can I do a color inversion on a jpg image in Maple?

Hi, Everyone.

I'm trying to figure out how to make a graph (actually a "line") change color based on certain criteria so I can create a Maple Application.

I've figured out the following, which indicates the sign of the graph by the color, but it's way more complicated than it ought to be.

It's also not robust as I need it to be, this happens to depend on the zeros occuring at integer values.  I could deal with that on a case by case basis, but not for something automatically.

I'm at a loss; maybe I'm not Googling the right things... maybe Maple can't do this (although I'd heard color tools were being added in Maple 16).

Does anyone have any suggestions?

Thanks In Advance!


Hi there,

I used to work with Maple 15. In Maple 15 the input-font-color was a beautiful plain red. Now I have to work with Maple 17, where the font-color was changed to a way darker red. 

I found a way to change the color in a single worksheet with Format-->Character-->Color. But I want to change it globally and permanently, so that every time I create a new worksheet the color is automatically red.

Do you have any ideas how to get this managed?

Thanks a lot!

Hello people,


I've been working with a list of [x,y,z] elements, where the x and y are positions, and z is the value at given x y. I wish to be able to plot the results so that they look like this

Plot of points


I made the above plot using the following code


where points[1] is a list of lists of points.

Glad that i was succesful, i tried to apply this method to a must larger number of points, only to be met by the following error

Error, (in makePlotFromLargeFNASet) assigning to a long list, please use Arrays

So, i made it so that points[1] became an array instead of a list of lists. When trying to apply surfdata now, using the exact same line as above, the plot is not 2D with colors as the 3rd dimension, but only returns a 3D plot as if dimension=3. It is endlessly frustrating, since there doesn't seem to be any sense to the error, and i cannot find an answer to why it does so. Any help would be appreciated!


Thanks in advance,



EDIT: I have uploaded the worksheet and the two files that i use on the following link:

I have generated a picture using pointplot and display that creates a grid of colors based on the angle between vectors and (1,0) in R^2. Each angle is given a unique color via the HSV color space. I would like to provide a legend explaining the colour, something along the lines of

red (brown) green (blue) red
0                Pi                 2*Pi

and possibly

red       (brown)       green 
angle1                     angle2   

Is there an easy way to do this, or will I have to mess around with a custom pointplot/textplot solution?

how to customize/invert the foreground/background color scheme in Maple?


The black on white is killing my eyes and also wasting energy, white on black is much better on the eyes and conserves energy (pixel brightness), imho


thanks in advance!



hi, is there a way to change color of the page in Maple 18? in fact I am preparing my lectures using slideshow option and want to change the color instead of the default white.

Hi All,

I am using pds:-animate to show the results of integration of a two function system, u(x,t) and v (x,t). I would like this command uses two different colors for each line but the command "color=[blue, green]" is not working and both lines have the same color (blue).

Some help?

Thanks a lot,



Matlab seems to be pretty strong at doing color plots with separate color bars, e.g.

Is this also possible in Maple and somehow in combination with `plots[surfdata](...,color=zhue,...)`?

In a 3d coordinate system I have a circular spacecurve with z-minimum -4 and z-maximum +4. In the same 3d coordinate system I have a 3d surface plot with z-minimum -0.5 and z-maximum +1.3 . When I choose the color option "Z(Hue)" in order to color-code the z-values on the 3d surface and make the topography more clear, I mostly get a totally green 3d surface. It seems that the color scaling is coupled with the spacecurve with z-values of +-4 . How can I uncouple the color scaling from the spacecurve and couple it with the z-range of the surface, while the color-limits shall be at +-1.3 ?

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