How would I turn this structure array into a matrix

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Brian Leon 2020-4-15

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评论： Ameer Hamza 2020-4-15

topTenWords.mat

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I tried this, but i got an error

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

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Ameer Hamza 2020-4-15

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编辑：Ameer Hamza 2020-4-15

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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

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Brian Leon 2020-4-15

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

Ameer Hamza 2020-4-15

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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)

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Star Strider 2020-4-15

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编辑：Star Strider 2020-4-15

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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)