bar graph with non numerical x-axis

2021 8 4
2 个回答
回答已采纳
更新时间：2021 8 5
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0 个投票

I have data which I have attached to the question (T_Stand_For_Sum). I want to display the first column as x-axis points, with the second column values as the bar heights. I have tried the following and recieved the following errors
xbar = T_Stand_For_Sum.ADBStand;
ybar = T_Stand_For_Sum.KWH;
bar(xbar,ybar);
Error using bar (line 41)
Not enough input arguments.
Error in Model_V_04 (line 234)
bar(xbar,ybar);
xbar = categorical({'T_Stand_For_Sum.ADBStand'});
ybar = T_Stand_For_Sum.KWH;
bar(xbar,ybar);
Error using bar (line 213)
Data inputs must match the axis configuration. A numeric axis must have numeric data inputs or data
inputs which can be converted to double.
Error in Model_V_04 (line 232)
bar(xbar,ybar);
bar(categorical(T_Stand_For_Sum{1:k, 1}), T_Stand_For_Sum{1:k, 2});
Error using bar (line 213)
Data inputs must match the axis configuration. A numeric axis must have numeric data inputs or data
inputs which can be converted to double.
Error in Model_V_04 (line 223)
bar(categorical(T_Stand_For_Sum{1:k, 1}), T_Stand_For_Sum{1:k, 2});

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 采纳的回答

Simon Chan
Simon Chan 2021-8-4

0 个投票

Try this:
bar(categorical(T_Stand_For_Sum.ADBStand),T_Stand_For_Sum.KWH)

4 个评论
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Mark Maders
Mark Maders 2021-8-4
I still recieve an error with this line of code
Error using bar (line 213)
Data inputs must match the axis configuration. A numeric axis must have numeric data inputs or data
inputs which can be converted to double.
Error in Model_V_04 (line 238)
bar(categorical(T_Stand_For_Sum.ADBStand),T_Stand_For_Sum.KWH)
Mark Maders
Mark Maders 2021-8-4
T_Stand_For_Sum is a table. Is this why the error is appearing? I have tried converting it to other formats but cannot manage that either
Simon Chan
Simon Chan 2021-8-4
Forgot to mention one step:
(1) You may close figure 1 and then run the script, or
(2) Put figure 2 as follows, you will get two figures
load('T_Stand_For_Sum.mat');
figure(2);
bar(categorical(T_Stand_For_Sum.ADBStand),T_Stand_For_Sum.KWH)
Mark Maders
Mark Maders 2021-8-4
thank you that is working now

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更多回答（1 个）

Peter Perkins
Peter Perkins 2021-8-5

1 个投票

Simon's solution is one way to do it. But using categorical just to label the bars is kind of an abuse of categorical, which is intended to represent data where you have a large number of elements drawn from a small number of discrete values. Lots of repeated values.
Another way to label the bars is to just label them:
>> bar(T_Stand_For_Sum.KWH)
>> set(gca,"XTick",1:33,"XTickLabel",T_Stand_For_Sum.ADBStand)

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