string 如何使用字符串作为数据在 Matlab 中绘图？
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How to use string as data for plotting in Matlab?
提问by Amro
I want to use a words like, let's say, 'A', 'B' and 'C' on X-axis to show their corresponding properties on Y-axis. How can I write these strings on X-axis instead of numerical data?
我想使用诸如 X 轴上的“A”、“B”和“C”之类的词来显示它们在 Y 轴上的相应属性。如何在 X 轴而不是数字数据上写入这些字符串？
回答by Amro
Use 'XTick'and 'XTickLabel'properties of the axes handle.
Here's a simple example:
轴句柄的用途'XTick'和'XTickLabel'属性。
这是一个简单的例子：
x = 1:5;
y = rand(size(x));
plot(x, y, 'b')
set(gca, 'XTick',1:5, 'XTickLabel',{'A' 'B' 'C' 'D' 'E'})
回答by Geodesic
Set yourself up a cell with your letters (mine's called labels), then use the XTick property to set the same amount of ticks on the x axis as your label number. Finally, the XTickLabel property will write your labels to the x axis.
为自己设置一个带有字母的单元格（我的称为标签），然后使用 XTick 属性在 x 轴上设置与标签编号相同数量的刻度。最后，XTickLabel 属性会将您的标签写入 x 轴。
x = yourXdata;
y = yourYdata;
labels = {'A' 'B' 'C'};
plot(x, y);
set(gca, 'XTick', 1:3, 'XTickLabel', labels);
回答by Adeldime M.S Abdelgader
How to use CHARACTER Values instead of Numerical values in X axis. to label x as T1 T2 T3 T4 just use this : set(gca,'XTick',1:4,'XTickLabel',{'T1', 'T2', 'T3', 'T4'},'FontSize',15)
如何在 X 轴上使用字符值而不是数值。将 x 标记为 T1 T2 T3 T4 只需使用： set(gca,'XTick',1:4,'XTickLabel',{'T1', 'T2', 'T3', 'T4'},'FontSize', 15)
this command can be used after the plot command followed by the xlabel and ylabel , legand commands. you can also adjust the font size.
此命令可以在 plot 命令后跟 xlabel 和 ylabel 、legand 命令之后使用。您还可以调整字体大小。
Practical Example:
实际例子：
%% 50% Day
T1wSI=[54.17 115];
T2wSI=[53.5 112];
T3wSI=[52.2 110];
T4wSI=[51.2 108];
T1oSI=[50.25 94];
T2oSI=[49.18 92];
T3oSI=[48.2 90];
T4oSI=[46.1 84];
table1=[T1wSI;T2wSI;T3wSI;T4wSI;T1oSI;T2oSI;T3oSI;T4oSI ];
season2012=table1(:,1);
season2013=table1(:,2);
Tr1=[1 2 3 4];
Treatment1 =['T1wSI' 'T2wSI' 'T3wSI' 'T4wSI' 'T1oSI' 'T2oSI' 'T3oSI' 'T4oSI'];
%Tre1=['T1' 'T2' 'T3' 'T4'];
%set(gca,'FontSize',14)
figure(1)
set(gca,'XTick',1:4,'XTickLabel',{'T1', 'T2', 'T3', 'T4'},'FontSize',14)
plot(Tr1,table1(1:4,1),'--bs','LineWidth',3);% 2012
hold on;
plot(Tr1,table1(1:4,2),'-go','LineWidth',3);% 2013
plot(Tr1,table1(5:8,1),'--r*','LineWidth',3); % 2012
plot(Tr1,table1(5:8,2),'-m^','LineWidth',3);% 2013
set(gca,'XTick',1:4,'XTickLabel',{'T1', 'T2', 'T3', 'T4'},'FontSize',15)
xlim=[1 5];
xlabel('Treatments')
ylabel('Days to 50 % Flowering')
legend('With -Season 2012','Without -Season 2013','With -Season 2012','Without - Season 2013','Location','NorthEast');
回答by BajajG
You can also do this using the GUI.
您也可以使用 GUI 执行此操作。
1) Click on the figure axes to to open the Axes Property Editor.
1) 单击图形轴以打开轴属性编辑器。
2) Click on the "More properties" button on the right side of the window. This will open the inspector window of the axes.
2) 单击窗口右侧的“更多属性”按钮。这将打开轴的检查器窗口。
3) Click on the small button next to "XTickLabel" property to open the dialogue box as shown below.
3) 点击“XTickLabel”属性旁边的小按钮，打开如下图所示的对话框。
4) Enter the labels you want and click on "OK".
4) 输入您想要的标签，然后单击“确定”。
