How would I turn this structure array into a matrix

I tried this, but i got an error

A = ([topTenWords.word],[topTenWords.frequency])

Answer 1

[Ameer Hamza]

If you want to have different data types then you need to use cell array

A = [{topTenWords.word}' {topTenWords.frequency}']

If you want to save as matrix, you need to use seperate variables

A_word = {topTenWords.word}';
A_freq = [topTenWords.frequency];

For a general case, see: https://www.mathworks.com/help/releases/R2020a/matlab/ref/struct2cell.html

[Brian Leon]

Okay this worked,thank you. My overall goal is to use this matrix to plot on a bar plot, but I get an overall error.

A = [{topTenWords.word}' {topTenWords.frequency}'];
subplot(1,2,2)
bar(A,'FaceColor',[0.8500 0.3250 0.0980])

Error using bar (line 127)

Input arguments must be numeric, datetime, duration or categorical.

Error in storyAnalyzer (line 60)

bar(A,'FaceColor',[0.8500 0.3250 0.0980])

My bar plot is suppose to look like this.

[Ameer Hamza]

Brian, try this

A_word = categorical({topTenWords.word}');
A_freq = [topTenWords.frequency];
subplot(1,2,2)
bar(A_word, A_freq, 'FaceColor',[0.8500 0.3250 0.0980])

[Brian Leon]

Thank you. One last quesiton if you have time. I am trying to make this barGraph as I previously showed above but I get an error when running this code.

A_word = categorical({topTenWords.word}');
A_freq = [topTenWords.frequency];
subplot(1,2,2)
bar(A_word, A_freq, 'FaceColor',[0.8500 0.3250 0.0980])
title('Most Frequent Words')
ylabel('Word Frequenices')
set(gca,'XTick',[1:10],'xticklabel',topTenWords)
xtickangle(90)

The error is because my topTenWords is a 1x10 structure array. Is there any way I can turn this structure array into a cell array with just the contents on the left(topTenWords.word)

[Ameer Hamza]

Brian, A_word in my answer already gives you a cell array. The issue here is that you were trying to set the wrong property. Try this code

A_word = categorical({topTenWords.word}');
A_freq = [topTenWords.frequency];
ax = subplot(1,2,2);
bar(A_word, A_freq, 'FaceColor',[0.8500 0.3250 0.0980])
title('Most Frequent Words')
ylabel('Word Frequenices')
ax.XAxis.Categories = A_word;
xtickangle(90)

[Brian Leon]

This code doesnt order the bar plot from highest frequency to lowest frequency, from left to right. This was my output.

[Ameer Hamza]

I think that the vector [topTenWords.frequency] is not always sorted. try this.

A_word = categorical({topTenWords.word}');
A_freq = [topTenWords.frequency];
[A_freq, idx] = sort(A_freq, 'descend');
A_word = A_word(idx);

ax = subplot(1,2,2);
bar(A_word, A_freq, 'FaceColor',[0.8500 0.3250 0.0980])
title('Most Frequent Words')
ylabel('Word Frequenices')
ax.XAxis.Categories = A_word;
xtickangle(90)

Answer 2

[Star Strider]

You did it correctly in the files in How can i remove from a cell array, the words in another cell array?

EDIT — (15 Apr 2020 at 18:51)

Try this:

D3 = load('topTenWords.mat');
word = cellfun(@(x)x, {D3.topTenWords.word}, 'Uni',0)
frequency = cellfun(@(x)x, {D3.topTenWords.frequency});

figure
bar(frequency)
set(gca, 'XTickLabel',word, 'XTickLabelRotation',30)

producing: