Help changing axis direction with for loop plot.

5 次查看（过去 30 天）
Cody Arnold
Cody Arnold 2020-4-11
评论： Les Beckham 2020-4-11
Hello,
I am trying to graph data from excel with a for loop but I need to reverse and log my x axis. I figured out how to log the axis but trying to use set(gca,''XDir','reverse') does not work. It gives the error "Unable to use a value of type matlab.graphics.axis.Axes as an index.". Thanks for any advice. Here is also an example of what I'm looking to achieve as far as the axis is concerned.
data = xlsread('Field_Testing','GrainSize');
sz = size(data);
rows = sz(1);
colms = sz(2);
set1 = data(:,[1,2]);
c = {};
for j = 1:colms
if rem(j,2) == 0
set = data(:, [j-1, j]);
c{end+1} = set; %saves to end of each previous cell
end
end
figure()
for z = 1:(colms/2)
arr = c{z};
arr = rmmissing(arr);
x = arr(:,1);
y = arr(:,2);
p = semilogx(x,y);
set(gca,'XDir','reverse')
hold on
end
hold off
  3 个评论
显示 1更早的评论
Cody Arnold
Cody Arnold 2020-4-11
编辑：Cody Arnold 2020-4-11
Oh ok, thanks for the tip I really appreciate it!
By reverse I mean I want the axis to plot in descending order. It should be in log scale as well but I already got that part with semilogx. Removing the vairable set seems to have fixed it! thanks again!
Les Beckham
Les Beckham 2020-4-11
I'm glad that helped. As far as doing the 'reverse' log, you might try my idea of plotting 1/x instead of x and experiment to see if that gets you closer to what you want.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Annotations 的更多信息

标签

产品


版本

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by