How can I plot data from a text file--an array of numbers versus an array of strings?

15 次查看（过去 30 天）
Ann St
Ann St 2020-9-15
编辑： Adam Danz 2020-9-15
I want to plot data from a text file, where x is an array of categories (strings) and y is an array of numbers. I have followed examples online, but so far nothing is working. If anyone could please point me in the right direction, I would be very grateful.
For example, after I have read in my array of strings and print it out, I get:
'Dry'
'Wet'
'Saturated'
'Wet'
'Wet'
'Dry'
The array of numbers is the same size as the array of strings (i.e., there's a value to match each string entry):
1
2
3
4
5
6
1. I have tried (among other things):
labels = {stringArray};
plot(numberArray, 'o', 'MarkerSize', 5)
set(gca, 'XTickLabel',labels)
But get this error:
Error using matlab.graphics.axis.Axes/set
While setting property 'XTickLabel' of class 'Axes':
Cell array can only contain character vectors or numbers.
Error in metadata_plots_vi_text (line 38)
set(gca, 'XTickLabel',labels)
2. I also tried writing this for "labels"
labels = [WRB_ISRIC];
This gives me a plot where the X axis has "Wet Wet Wet Dry Saturated" instead of "Wet Dry Saturated."
Does anyone know an alternative?

请先登录，再回答此问题。

采纳的回答

Adam Danz
Adam Danz 2020-9-15
编辑：Adam Danz 2020-9-15
Here's a variety of ways to use the strings as axis ticks.
After a second look, you're probably looking for the last method.
stringArray = {
'Dry'
'Wet'
'Saturated'
'Wet'
'Wet'
'Dry'};
numberArray = [
1
2
3
4
5
6];
clf
s(1) = subplot(4,1,1);
plot(numberArray, categorical(stringArray), 'o-');
title('plot()')
s(2) = subplot(4,1,2);
stem(numberArray, categorical(stringArray), 'o-');
title('stem()')
s(3) = subplot(4,1,3);
[n,cats]= histcounts(categorical(stringArray));
bar(categorical(cats),n);
title('bar()')
s(4) = subplot(4,1,4);
plot(numberArray, 'o', 'MarkerSize', 5)
set(s(4), 'XTick', 1:numel(numberArray), 'XTickLabel', stringArray)
title('XTick & XTickLabel')
s(5) = subplot(5,1,5);
plot(categorical(stringArray), numberArray, 'o', 'MarkerSize', 5)
title('plot(categorical, y)')
set(s(1:2),'XTick',1:6,'XLim',[0,7])
For earlier releases of Matlab that did not support automatic assignment of categorical tick labels,
cats = categorical(stringArray);
catsUnq = categories(cats);
plot(categorical(stringArray), numberArray, 'o', 'MarkerSize', 5)
set(gca, 'XTick', 1:numel(catsUnq), 'XTickLabel', catsUnq)
  13 个评论
显示 11更早的评论
Ann St
Ann St 2020-9-15
编辑：Ann St 2020-9-15
@Adam Danz, thanks a lot. I assume the "x" is on the "set" line is a typo because if I leave that out, it works!! Again, thank you. Really grateful.

请先登录，再进行评论。

更多回答（1 个）

Xavier
Xavier 2020-9-15
Try using
set(gca, 'XTickLabel',stringArray)
instead, you don't need a cell array to have labels
  3 个评论
显示 1更早的评论
Adam Danz
Adam Danz 2020-9-15
Yes, Xavier's correct, if the goal is to set the x-tick labels.
Whenever setting XTickLabel, also set XTick. Otherwise, you risk a mismatch between the number of ticks and labels and Matlab will either wrap the labels or skip the extras by default.
set(gca, 'XTick', 1:numel(stringArray), 'XTickLabel',stringArray)
Ann St
Ann St 2020-9-15
@Adam Danz. Thank you for that--very nice of you. I implemented your suggestion but still get repeated labels.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Data Distribution Plots 的更多信息

标签

产品


版本

R2016a

Community Treasure Hunt

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

Start Hunting!

Translated by