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4way logarithmic plot in Mathcad
faux_phdisabled Feb 13, 2006 12:00 AM (in response to ValeryOchkov)Attached is a sample of 4way log graph and the corresponding example of what I would like to do. I hope this helps.
4way log graph.doc 1.6 MB

4way logarithmic plot in Mathcad
Moe Szyslak Feb 13, 2006 12:00 AM (in response to faux_phdisabled)
Earthquakes aren't exactly my thing, but is that the standard tripartite plot commonly used in earthquake engineering? If so, a buddy of mine in graduate school figured out how to generate one in Mathcad 2001i, but I don't have the sheet. So, take solace in the fact that it can be done, but I'm afraid that I can't help you more directly than that.
Matt 
4way logarithmic plot in Mathcad
A.Non Feb 13, 2006 12:00 AM (in response to faux_phdisabled)I assume you are plotting natural vibration period against pseudo velocity. The deformation and pseudo acceleration are quantities that can be calculated from these. Correct?
If so, generating diagonal lines that represent those two quantities would not be that hard. Numbering the axes is much harder, but fortunately 90% of what you would need is available in the electronic book "Creating Amazing Images With Mathcad" by Byrge Birkeland, section 1.6 (you can download this from the Mathsoft website).
Richard 
4way logarithmic plot in Mathcad
FredKohlhepp Feb 13, 2006 12:00 AM (in response to faux_phdisabled)Man, I thought I had seen some confusing graphs. . . .
Can we assume that the two sets of orthogonal axes parameters are related? (If we plot a point on the horizontal/vertical coordinates, it is the same point on the diagonal coordinates.) IF so, then the diagonal axes can be defined as functions of the vertical/horizontal axes. At that point, you can probably trick Mathcad into drawing this graph.
Fred Kohlhepp
fkohlhepp@sikorsky.com


4way logarithmic plot in Mathcad
ValeryOchkov Feb 13, 2006 12:00 AM (in response to faux_phdisabled)I work with logarithmic plot in Mathcad and Mathcad Application Server
See example
http://twt.mpei.ac.ru/MAS/Worksheets/Dow/DOWEX_MARATHON_C/Fig_3r.mcd
But what is it 4way logarithmic plot?
Val
http://twt.mpei.ac.ru/ochkov/v_ochkov.htm