Can't get custom x-axis grid lines for a LogLinearPlot

Question

Needs["ErrorBarPlots`"]

Needs["ErrorBarLogPlots`"]

errorplot1 = 
  ErrorListLogLinearPlot[{{{100.15, -5.3}, 
     ErrorBar[0.4]}, {{150.05, -3.0}, ErrorBar[0.4]}, {{200.32, -2.2},
      ErrorBar[0.4]}, {{250.15, -1.7}, 
     ErrorBar[0.4]}, {{300.18, -1.3}, ErrorBar[0.4]}}];

LogLinearPlot[
  20*Log10[2*Pi*10000*107*10^(-9)*
     x/Sqrt[1 + (2*Pi*x*10000*107*10^(-9))^2]], {x, 80, 350}];

Show[%, errorplot1, AxesStyle -> {Opacity[0], AbsoluteThickness[3]}, 
 Frame -> True, 
 GridLines -> {{100, 150, 200, 250, 300, 
    350}, {-6, -5, -4, -3, -2, -1}}, GridLinesStyle -> LightGray]

I plotted some measurement data and the theoretical curve of a function. Now I tried making a grid but I can only see the grid of the y-axis. I tried removing the AxesStyle (since I made the x-axis invisible) but that didn't work... Here's what it currently looks like:

Probably a duplicate of http://mathematica.stackexchange.com/q/4066/9490 , but the answers there are much more complicated than what is needed here. — Jason B., Feb 05 '16 at 09:09

score 6 · Accepted Answer · edited Apr 13 '17 at 12:55

6

Your x-axis values are on a log scale, so you need to use Log values for the gridlines.

Show[%, errorplot1, AxesStyle -> {Opacity[0], AbsoluteThickness[3]}, 
 Frame -> True, 
 GridLines -> {Log@{100, 150, 200, 250, 300, 
     350}, {-6, -5, -4, -3, -2, -1}}, GridLinesStyle -> LightGray]

Edit This is if you want to add the gridlines afterwards when combining things with Show. But as OP points out here, you can give the gridline command to the log plot and it will make the conversion automatically.

edited Apr 13 '17 at 12:55

Community

1

answered Feb 05 '16 at 09:07

Jason B.

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Thanks a lot, I didn't know that and this was really helpful! – Keno Goertz Feb 05 '16 at 09:23

Keno Goertz · Answer 2 · 2016-02-05T09:22:37.630

I solved it by adding the grid lines to the theoretical function. Still curious why it didn't work the way I did it in my question though.

Edit: Here's my code that solved it.

Needs["ErrorBarPlots`"]

Needs["ErrorBarLogPlots`"]

errorplot1 = 
  ErrorListLogLinearPlot[{{{100.15, -5.3}, 
     ErrorBar[0.4]}, {{150.05, -3.0}, ErrorBar[0.4]}, {{200.32, -2.2},
      ErrorBar[0.4]}, {{250.15, -1.7}, 
     ErrorBar[0.4]}, {{300.18, -1.3}, ErrorBar[0.4]}}];

LogLinearPlot[
  20*Log10[2*Pi*10000*107*10^(-9)*
     x/Sqrt[1 + (2*Pi*x*10000*107*10^(-9))^2]], {x, 80, 350}, 
  GridLines -> {{100, {150, Orange}, 200, 250, 300, 
     350}, {-6, -5, -4, {-3, Orange}, -2, -1}}];

Show[%, errorplot1, AxesStyle -> {Opacity[0], AbsoluteThickness[3]}, 
 Frame -> True]

Can't get custom x-axis grid lines for a LogLinearPlot

2 Answers2