Contour Plot when both x & y axis are in logscale

2022 8 19
2 个回答
更新时间：2023 7 31
13 次查看（30 天）

1 个投票

Can anyone help me to contour plot when both x & y axis are in logscale? Please see the figure.
I have coded like below but it didn't show logscale in both axis:
f=logspace(-3,0,100);
R0=logspace(-6,-2,100);
[X,Y]=meshgrid(f,R0);
%%%Main code body
....
.....
.....
Z=1+(gamma/(k*d^2))*(f.^2*delL+delR+2*R0.*X.*Gamma_func);
%%%%%%%
contour(X,Y,Z)

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回答（2 个）

Ran in:

1 个投票

Ran in:
x = linspace(0,2*pi);
y = linspace(0,4*pi);
[X,Y] = meshgrid(x,y);
Z = sin(X)+cos(Y);
% Plot using contour
figure;
contour(X,Y,Z);
% Use the 'set' command to graph in log scale
set(gca, 'XScale', 'log');
set(gca, 'YScale', 'log');
axis tight; % Adjust the axis limits
xlabel('X');
ylabel('Y');
Chunru
Chunru 2022-8-19
编辑：Chunru 2022-8-19
Ran in:

0 个投票

Ran in:
[x, y, z] = peaks;
x = x+4; y = y+4; z=z+8; % make it positive
figure
contourf(x, y, z);
colorbar
xlabel('x'); ylabel('y');
figure
%contour(log10(x), log10(y), z);
contourf(log10(x), log10(y), log10(z));
h2 = colorbar;
zt = h2.Ticks;
h2.TickLabels = "10^{"+string(zt')+"}";
% customize ticklabels
xt = xticks;
xticklabels("10^{"+string(xt')+"}");
yt = yticks;
yticklabels("10^{"+string(yt')+"}");
xlabel('x'); ylabel('y');

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Thank you for your response. Pls see my figure. I want log scaling in both X and Y axis.
Chunru
Chunru 2022-8-19
编辑：Chunru 2022-8-19
Yes. The plot has log scaling for both X and Y axes. Do you also want to have log-scale z-axis?
The code has been updated for log scale for x, y and z axes.
Thank you.But what you plotted is not representing the axis are in logarithm scale.
Chunru
Chunru 2022-8-19
What do you mean? They are indeed in log scale.

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