Re: Re: Very basic question: Zoom into a 2-D plot with the mouse

*To*: mathgroup at smc.vnet.net*Subject*: [mg51429] Re: [mg51406] Re: Very basic question: Zoom into a 2-D plot with the mouse*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Sun, 17 Oct 2004 03:05:19 -0400 (EDT)*Organization*: Mathematics & Statistics, Univ. of Mass./Amherst*References*: <ck87ph$9lv$1@smc.vnet.net> <200410141037.GAA14928@smc.vnet.net> <cknteh$5li$1@smc.vnet.net> <200410160820.EAA23690@smc.vnet.net>*Reply-to*: murray at math.umass.edu*Sender*: owner-wri-mathgroup at wolfram.com

Evidently, yes, a matter of definition. I distinguish between the size of an image and the magnification used in the viewing window. Look, for example, at mapquest.com When you choose to zoom in or zoom out on a map there, you do not get a larger or smaller image, but rather an image of the SAME size but magnified by a factor > 1 or < 1 (around the center or some other specified point). The same thing is the case in any graphing calculator. Often, that's what folks want when they want to zoom in on a graph -- to examine some feature of it more closely, given the same viewing window physical space in which to view it. AES/newspost wrote: > In article <cknteh$5li$1 at smc.vnet.net>, > Murray Eisenberg <murray at math.umass.edu> wrote: > > >>ImageSize does not change the PlotRange, hence does NOT have the effect >>of zooming in (or out) of a graphic. When people speak of zoom in or >>zoom out, they ordinarily mean that the physical image size remains the >>same. > > > Huh? I think there's a semantics problem here. If I replot a plot with > ImageSize tripled, the image size _on the screen_ is three times larger, > which is certainly what I think of as the "effect of zooming" in an > on-screen graphic, or as the "physical image size" of an on-screen > graphic. > > > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305

**References**:**Re: Very basic question: Zoom into a 2-D plot with the mouse***From:*Steve Gray <stevebg@adelphia.net>

**Re: Very basic question: Zoom into a 2-D plot with the mouse***From:*AES/newspost <siegman@stanford.edu>