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.

Answer 1

[DGM]

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

[nadia naji]

I am a beginner in Matlab and I am not familiar with xticks. how can I define it?

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/xticks.html

[Star Strider]

The xticks function was introduced in R2016b.

[DGM]

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.

Answer 2

[Star Strider]

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)

.

Answer 3

[Jan]

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);

Answer 4

[Walter Roberson]

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.

[nadia naji]

what is xticks, becuase it produces this error.

Undefined function or variable 'xticks'

[nadia naji]

the value of them is not important and they are not related to each other.

[Walter Roberson]

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)

[nadia naji]

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'})