string for x label in a plot

Hello,
I have 15 values for x label but they are not consecutive values. for exampl they are bitrate values from 100 kb to 900 kb and 1 mb to 6 mb. but I do not know how can I put them in x axis. I have to put
x=1:15
to have 15 values in x axis. another problem is in x axis we only have numbers such as 0, 5,10 and 15 but I want to have all values in x axis. could you please help me with this issue:? my realese is R2016a. thanks.

回答(4 个)

You can make the tick labels whatever you want. They don't have to be a literal label of the tick locations.
x = 1:10;
y = sin(x);
xtlbls = {'cat' 'dog' 'tree' 'fruit' '10.413' '⅄∃H' 'red' 'blue' 'words' 'numbers'};
plot(x,y);
xticks(x) % define tick locations explicitly
xticklabels(xtlbls) % define tick labels

4 个评论

I am a beginner in Matlab and I am not familiar with xticks. how can I define it?
https://www.mathworks.com/help/matlab/ref/xticks.html
The xticks function was introduced in R2016b.
Oof. I knew it was R2016b, but I misread the version OP was using.
You can always use set() to set the 'xtick' and 'xticklabel' property of the current axes.

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Try this —
figure
plot((1:15), sin((1:15)/2.5))
xtl = [(1:9)*1E8 (1:6)*1E9];
set(gca, 'XTick',(1:15), 'XTickLabel',xtl)
EDIT — (31 May 2022 at 15:11)
Added x-tick labels to match units in the original post.
EDIT — (31 May 2022 at 18:08)
Another option for the labels:
xtl = [sprintfc('%3d kb',(1:9)*100) sprintfc('%d mb',1:6)]
figure
plot((1:15), sin((1:15)/2.5))
xtl = [sprintfc('%3d kb',(1:9)*100) sprintfc('%d mb',1:6)];
set(gca, 'XTick',(1:15), 'XTickLabel',xtl)
.
Jan
Jan 2022-5-31
编辑:Jan 2022-5-31
It is not really clear, what you are asking for. But you can set the XTicks and the corresponding lables freely.
x = 1:15;
y = rand(1, 15);
axes('XTick', 1:15, 'XLim', [1, 15], 'XTickLabel', ...
{'A', 'b', '17', '5', 'D', 'now', 'then', '9', '-pi', '10', ...
'11', '12', '-', '14', 'ready'}, ...
'NextPlot', 'add');
plot(x, y);
xticks(1:15)
Lab = [(1:9) + "kb", (1:6) + "mb"]
xticklabels(Lab)
Are you sure that you want linear 1:15 x, but 1:9 vs 10:15 is at different scales? The entry for x=11 is not 2 units more than the entry for x=9, and that is going to lead to misleading plots.

4 个评论

what is xticks, becuase it produces this error.
Undefined function or variable 'xticks'
the value of them is not important and they are not related to each other.
xticks as a function was introduced in the release immediately after the one you have. In your release
set(gca, 'Xtick', 1:15)
set(gca, 'XTickLabel', Lab)
in my matlab release we do not have "" and I changed it to
Lab = [(1:9) + 'kb', (1:6) + 'mb']
but it produces this error:
Matrix dimensions must agree
my code is :
Lab = [(1:9) + 'kb', (1:6) + 'mb']
set(gca, 'Xtick', 1:15)
set(gca, 'XTickLabel', Lab)
h = zeros(6,4);
h(:,1) = plot(x,res540,'-r');
hold on
h(:,2) = plot(x,res720,'--b');
h(:,3) = plot(x,res900,'-.g');
h(:,4) = plot(x,res1080,':k','LineWidth',0.2);
% make a legend for the 1st line returned from
% each plot call (i.e., first row of h)
legend(h(1,:),{'540' '720' '900' '1080'})

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