This thread has some options for doing this.

 

Regards,  Georgios Kokovidis  Dräger Medical

 

>contourplot(f,x=-2..2,y=-2..1,color=red,contours=10);

>contourplot(f,x=-2..2,y=-2..1,color=red,contours=[-1,-7/16,0,3/4]);

Regards,
Georgios Kokovidis
Dräger Medical

Look at the plot3d command below. Once you execute it you will get a plot. If you left click on the plot, the menu bar will change and it will display and angle "theta", and an angle "phi". If you click on the plot and rotate it, those angles will change. You can rotate it and note the angles for a view that you like. Then you can include those angles into your plot3d command. See the second command below. See ?plot3d/details for more help on this. >plot3d(f, x=-2..2, y=-2..1,axes=boxed); >plot3d(f, x=-2..2,y=-2..1,axes=boxed,orientation=[45,46]); Regards, Georgios Kokovidis Dräger Medical

I don't know about the gridlines in a 3D plot, but for your second question, the only built in function that comes to mind is matrixplot. See the help pages for more details. >?matrixplot Regards, Georgios Kokovidis Dräger Medical

>restart: >eq:=2*x^2+4*y-6; eq := 2*x^2+4*y-6 >tcoeff(eq); -6 Regards, Georgios Kokovidis Dräger Medical

You can suppress the output from being echoed back to the screen by replacing the ending semicolon ( ; ) after the word "proc" by a colon ( : ). The procedure would look like this: >f:=proc(x) if x>0 then x else -x; fi; end proc: You would call it just like before. Take a look at the help pages and you can also do a Google search for "Maple procedures". Regards, Georgios Kokovidis Dräger Medical

Using Maple 11 GUI interface, if you right click on the plot you can select Axes-Labels and edit the x-axis label. You also have the option to add a y-axis label. For the spreadsheet, this seems to be a limitation at the moment, as far as I can tell. I tried to import a data file with 200 rows of data, and it stopped when it got to row 100. I did not see anything in the help files that suggested a way to extend this beyond 100 rows. Regards, Georgios Kokovidis Dräger Medical

Go to File - Export As and choose RTF... This will export the whole worksheet. Then open this in Word, and cut and paste the relevant outputs from the RTF file into your new document. Regards, Georgios Kokovidis Dräger Medical

An example to compare the colors. >restart: >with(student):leftbox(x,x=0..2,color=blue); >plot3d(x*y, x=-1..1, y=-1..1, color=COLOR(RGB,.7,.9,.7)); I got the RGB color values by looking at the code for the leftbox command. Take a look at line 13 after executing the command below. >showstat(leftbox); 13 shadecolor := COLOR(RGB,.7,.9,.7) The following link might be of interest. Regards, Georgios Kokovidis Dräger Medical

Take a look at the help files for implicitplot3d and see if that will do what you are looking for. >?implicitplot3d >restart: >a:=4: >with(plots): >implicitplot3d(x^2+y^2+z^2>=a^2, x=-4..4, y=-4..4,z=-4..4); After it plots, you can click on the plot and rotate it. You can change the "a" value and see what happens and alter the range values for x,y, and z as well. Regards, Georgios Kokovidis Dräger Medical

>restart: >zurflu14:=t->A*exp(-k*t); >dzurflu14:=unapply(diff(zurflu14(t),t),t); >A:=5;k:=5; >dzurflu14(3); >evalf(%); Regards, Georgios Kokovidis Dräger Medical

This usually happens when fsolve can not find a solution. Can you post your code or your worksheet. Without looking at your code, we can not help you. Regards, Georgios Kokovidis Dräger Medical

It can not be done with a single value. Here is why: The HUE color specification only requires a single floating-point value and cycles through the colors of the spectrum based on the fractional part of the value. For example, COLOR(HUE, 0.9) is violet, while COLOR(HUE, 0.0) is red. COLOR(HUE, x) is equivalent to COLOR(HSV, x, 0.9, 1.0). Regards, Georgios Kokovidis Dräger Medical

Go to this link from the Maple Applications center. Take a look at worksheet "Section 9.2 Bilinear Transformations". You have to log in to be able to download. There were some issues with your posting as well. I think you missed some control characters. Regards, Georgios Kokovidis Dräger Medical

Take a look at the help pages for the plot command dealing with color values. At the command prompt, type the following: >?plot/colornames >restart: >i:=0:j:=0:k:=0: >plot(sin(x),color=COLOR(RGB,i,j,k)); Your program can assign values to i,j,and k to control the colors the way you want them. Regards, Georgios Kokovidis Dräger Medical