User talk:Gregvw

Welcome!

Hello, Gregvw, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

I hope you enjoy editing here and being a Wikipedian! Please sign your name on talk pages using four tildes (~~~~); this will automatically produce your name and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or ask your question and then place {{helpme}} after the question on your talk page. Again, welcome! Oleg Alexandrov (talk) 14:50, 27 April 2007 (UTC)[reply]

I fixed some bugs in the formulas you added at Five-point stencil. Perhaps you could check what I changed to see if that's indeed correct. Cheers, Oleg Alexandrov (talk) 15:14, 27 April 2007 (UTC)[reply]

Re:Plots

I replied on my talk page. Cheers, Oleg Alexandrov (talk) 15:25, 4 May 2007 (UTC)[reply]

You asked about uploading a MATLAB plot to Wikipedia. Two suggestions: Upload to Commons rather than just to Wikipedia, for wider use. And instead of trying to create a PNG file, use the plot2svg tool to create SVG. Incidentally, gnuplot can directly produce SVG output, so for some situations (though probably not this one) it may be a better choice. --KSmrq^T 19:22, 4 May 2007 (UTC)[reply]

Thanks! I am using a Mac and was able to do the conversion with GraphicsConverter. Gregvw 08:06, 5 May 2007 (UTC)[reply]

GraphicConverter has been a great tool on the Mac for many years; but I think you missed the point of SVG. The original plot data should be used to create a vector drawing, which is crisp, compact, and scalable. What you did was marry the worst of both worlds, by converting the plot to a raster image within SVG, rather than to a PNG raster image. Here's an example of what I was hoping you would create: using gnuplot and a little custom curve-fitting, I created Image:Graph of example function.svg, which occupies a mere 6201 bytes yet allows zooming in on any detail. That's less space and more detail than the 250px thumbnail shown at function (mathematics), which occupies 9794 bytes! (Ordinarily the custom curve-fitting step would be omitted; see, for example Image:Cosine fixed point.svg, which EdC produced.) --KSmrq^T 00:15, 6 May 2007 (UTC)[reply]

Thanks for the explaination, this all quite new to me. I have downloaded the MATLAB scripts you suggested. How do I delete the files that I previously uploaded? Gregvw 20:15, 6 May 2007 (UTC)[reply]

The newness takes many months (years?) to wear off. Deletion is unnecessary; it will suffice to upload new versions with the same name (including the ".svg"). --KSmrq^T 20:20, 6 May 2007 (UTC)[reply]

License tagging for Image:Lebesgue function uniform vs chebyshev.svg

Thanks for uploading Image:Lebesgue function uniform vs chebyshev.svg. Wikipedia gets thousands of images uploaded every day, and in order to verify that the images can be legally used on Wikipedia, the source and copyright status must be indicated. Images need to have an image tag applied to the image description page indicating the copyright status of the image. This uniform and easy-to-understand method of indicating the license status allows potential re-users of the images to know what they are allowed to do with the images.

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This is an automated notice by OrphanBot. If you need help on selecting a tag to use, or in adding the tag to the image description, feel free to post a message at Wikipedia:Media copyright questions. 15:08, 5 May 2007 (UTC)