Clear Filters
Clear Filters

string for x label in a plot

225 views (last 30 days)
nadia naji
nadia naji on 31 May 2022
Edited: Star Strider on 31 May 2022
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.

Answers (4)

DGM
DGM on 31 May 2022
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 Comments
Star Strider
Star Strider on 31 May 2022
The xticks function was introduced in R2016b.
DGM
DGM on 31 May 2022
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.

Sign in to comment.


Star Strider
Star Strider on 31 May 2022
Edited: Star Strider on 31 May 2022
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 on 31 May 2022
Edited: Jan on 31 May 2022
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);

Walter Roberson
Walter Roberson on 31 May 2022
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 Comments
Walter Roberson
Walter Roberson on 31 May 2022
Edited: Walter Roberson on 31 May 2022
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
nadia naji on 31 May 2022
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'})

Sign in to comment.

Categories

Find more on 2-D and 3-D Plots in Help Center and File Exchange

Tags

Products


Release

R2016a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!