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Nov 08, · This video will show you how to draw graph in log scale. Create a log-log plot containing two lines, and return the line objects in the variable lg. x = logspace(-1,2); y1 = ^x; y2 = 1./^x; lg = loglog(x,y1,x,y2); Change the width of the first line to 2, and change the color of the second line to purple.

Join Stack Overflow to learn, share knowledge, and build your career. Connect and share knowledge within a single location that hod structured and easy to search. My problem is that if I use, like written here, transAxesthen I get the circle to be actually a circle otherwise it is stretched on the x and looks like an ellipse cut in halfbut the x coordinate is 0.

If, on the other hand, I use transData instead of transAxesthen I get the correct value what does the term fitness mean the x coordinate, but the circle is stretched again and cut in half. I don't really mind the stretching but I don't like the cutting, I want it to be at least a full ellipse.

Probably the easiest way to do this would be to just use a plot marker how to measure moisture in the air of a Circle. For example:. This will give you a circle that will pog look 'circular' and will be centred on the correct x,y coordinate, although its size will bear no relationship to the x and y scales.

A more general way to do this would be to construct a new composite transformation for the circle - you should take a look at this tutorial on transformations. Basically, the transformation from figure to data space is constructed like this:. In ,og to do that, you can construct a scaled translation, then combine it hw transLimits and transAxes :. Obviously the scaling in drqw x-axis is going to be a bit weird and arbitrary - you'll need to play around with how you construct the transformation in order to get exactly what you want.

How are we doing? Please help us improve Stack Overflow. Take our short survey. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Asked 7 years, 6 months ago. Active 7 years, 6 months ago. Viewed 2k times. I want to have a circle in a plot made with pyplot, but I need to use a log scale on the x axis.

Any idea how to obtain what I want? Improve this question. Add a comment. Active Oldest Votes. For example: ax. In order to do that, you can construct a scaled translation, then combine it with transLimits and transAxes : from matplotlib. Improve this answer. Sign up or log in Sign up using Google.

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To create a log axis: Double-click on the axis to open the Format Axes dialog. In the Scale section, set the axis to Log10 or Log 2 or Ln (natural logarithm). This graph shows log10 spaced minor ticks. The minor ticks between the major ticks at 10 and show the . ellipse1[l_, r_, t_, b_]:= Circle[{(r + l)/2, (Log[t] + Log[b])/2}, {(r - l)/2, (Log[t] - Log[b])/2}] LogPlot[x^x, {x, 1, 5}, Epilog -> {Black, ellipse1[2, 4, 5, ]}] If you want to show a truly elliptical region distorted by the log scale on the y axis. from speednicedating.comorms import ScaledTranslation ax = speednicedating.com(xscale='log') x,y = 10,0 speednicedating.com_ylim(,11) speednicedating.com_xlim(1E,1E11) # use the axis scale tform to figure out how far to translate circ_offset = ScaledTranslation(x,y,speednicedating.comcale) # construct the composite tform circ_tform = circ_offset + speednicedating.comimits + speednicedating.comxes # create the circle centred on the origin, apply the composite tform circ .

This page shows how to stretch the axis to a logarithmic scale which doesn't alter your data. Distinguish this from transforming your data to logarithms, which you can plot. To create a log axis:.

Double-click on the axis to open the Format Axes dialog. In the Scale section, set the axis to Log10 or Log 2 or Ln natural logarithm. This graph shows log10 spaced minor ticks. The minor ticks between the major ticks at 10 and show the position of 20, 30, 40, 50, 60, 70, 80 and Since the minor ticks are not equally spaced on the graph, we call these log spaced minor ticks. Note that there are eight ticks, so nine intervals many people mistakenly think there ought to be ten.

To set the numbering for a log10 axis:. Double-click on the axis to open the Format Axes dialog and set the number format in the Numbering or Labeling section.

Prism offers four numbering format choices for log10 axes. Antilog: 10, , , , etc. Scientific: 1x10 1 , 1x10 2 , 1x10 3 , 1x10 4 ,etc. Log: 1, 2, 3, 4, etc. To set the numbering for a ln axis:. Prism offers three numbering format choices for log10 axes. Ln: 1, 2, 3, 4, etc. To set the minor tick intervals for a log axis:. Choose Equal or Log spacing, and the number of intervals you want between major ticks, not the number of ticks.

All rights reserved. To create a log axis: Double-click on the axis to open the Format Axes dialog. To set the numbering for a log10 axis: Double-click on the axis to open the Format Axes dialog and set the number format in the Numbering or Labeling section. To set the numbering for a ln axis: Double-click on the axis to open the Format Axes dialog and set the number format in the Numbering or Labeling section.

To set the minor tick intervals for a log axis: Double-click on the axis to open the Format Axes dialog and set the number format in the Numbering or Labeling section. Scroll Prev Top Next More.

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Excellent vid, thanks.