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Hi, I'm interested in creating the simplest code for downloading a picture which is in a "constant" internet address and saving it in disk. An example w'd be to save the picture http://waves.terra.com.br/forecast/grafico_ondas_santos.gif which is updated every day. tks

Hi: I want to build a project in which there is a field where the user put an mathematical expression. Then I want to use this expression to make some calculations. As an example the user would type the expression cos(x*x) and the code would draw the graph of the function typed. Tks a lot.

Hi, I'd like any suggestions about the best form of creating an animation with a simple figure, for example, a pendulum. Is it possible to load an image of a simple pendulum and after some calculation of its angle, rotate the image to produce the animation? Is a simpler way to do this? Thanks a lot.

Hi there: I'm trying to plot some xy charts using the Canvas of a TImage, changing some pixels color. Does somebody know if it is possible to refresh the image so that I can see the points being plotted one by one? Tks

I have just started with tcl/tk and I've been trying to develop a simple routine to plot xy points in a file created by a c++ program. I created a list of entry widgets that pass the pararameters for the c++ program. This one saves the list of xy points in a file and and the points are read and...