How to get xticklabels from xticks by merging cells?

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Louis Tomczyk
Louis Tomczyk 2022-8-24
评论： Louis Tomczyk 2022-8-24
Ran in:
Dear all,
I want to get my ticklabels from an array of numbers.
As the function is taking a cell-array, I want to create a function which enables the conversion of my array of numbers into a cell :
Xticks = [1,2,3];
Xtickslabels = tick2ticklabel(Xticks)
>>> Xtickslabels = {'1','2','3'}
I tried this:
Xticks = [1,2,3];
tmp = split(num2str(Xticks))
tmp = 3×1 cell array
{'1'} {'2'} {'3'}
tmp = reshape(tmp,1,length(tmp))
tmp = 1×3 cell array
{'1'} {'2'} {'3'}
But I am stuck here as I didn't find a way to merge the cells into one.
Thanks in advance.
Best regards,
louis

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采纳的回答

Chunru
Chunru 2022-8-24
Ran in:
plot(randn(7,1))
Xticks = 1:2:7; % for example
% It's simpler and neater to use string
Xtickslabels = string(Xticks)
Xtickslabels = 1×4 string array
"1" "3" "5" "7"
set(gca, 'XTick', Xticks, 'XTickLabel', Xtickslabels)

更多回答（2 个）

Mathieu NOE
Mathieu NOE 2022-8-24
hello
here you are my friend :
Xticks = [1,2,3];
tmp = num2str(Xticks);
Xtickslabels{1} = tmp;
Louis Tomczyk
Louis Tomczyk 2022-8-24
Hello again,
Actually I used both of your answers @Chunru and @Mathieu NOE and thanks for it.
The function I created is then taking 2 arguments an array of doubles and the number of decimals we want.
function Ticklabels = ticks2ticklabels(ticks,decimals)
Ticklabels = string(ticks);
for k = 1:length(Ticklabels)
tmp = char(Ticklabels(k));
index_comma = strfind(tmp,'.');
if decimals == 0
Ticklabels(k) = tmp(1:index_comma-1);
else
Ticklabels(k) = tmp(1:index_comma +decimals);
end
end
Ticklabels = {Ticklabels}
end
It produces the desired output:
Xticks = logspace(1.5,5.5,20)
Xticklabels = tick2ticklabels(Xticks,0)
>> Xticks
Xticks =
1.0e+05 *
Columns 1 through 14
0.0003 0.0005 0.0008 0.0014 0.0022 0.0036 0.0058 0.0094 0.0153 0.0248 0.0403 0.0654 0.1062 0.1725
Columns 15 through 20
0.2801 0.4549 0.7386 1.1994 1.9475 3.1623
>> Xticklabels
Xticklabels =
1×1 cell array
{["31" "51" "83" "135" "219" "356" "579" "941" "1528" "2481" "4029" "6543" "10624" "17252" … ]}
but just doing
figure
xticks(Xticks)
xticklabels(Xticklabels)
produces the error:
Error using xticklabels (line 43)
Specify tick labels as cell array of character vectors, string array, or one of the 'mode', 'auto', or 'manual' options.
How to solve it?
Thanks again,
louis
  2 个评论
Mathieu NOE
Mathieu NOE 2022-8-24
hello again
Xticklabels must not be a 1 x 1 cell but a 1 x 20 cell
making all this code for 1 x 1 cell is unneccessary
Louis Tomczyk
Louis Tomczyk 2022-8-24
Ok but it does not change either.
I modified the function:
function Ticklabels = ticks2ticklabels(ticks,decimals)
Ticklabels = string(ticks);
for k = 1:length(Ticklabels)
tmp = char(Ticklabels(k));
index_comma = strfind(tmp,'.');
if decimals == 0
Ticklabels(k) = tmp(1:index_comma-1);
else
Ticklabels(k) = tmp(1:index_comma +decimals);
end
end
Ticklabels = cellstr(Ticklabels);
end
>> Xticklabels
Xticklabels =
1×20 cell array
Columns 1 through 13
{'31'} {'51'} {'83'} {'135'} {'219'} {'356'} {'579'} {'941'} {'1528'} {'2481'} {'4029'} {'6543'} {'10624'}
Columns 14 through 20
{'17252'} {'28013'} {'45487'} {'73861'} {'119935'} {'194748'} {'316227'}
But still nothing.
figure
plot(randn(1,20))
Xticks = logspace(1.5,5.5,20);
Xticklabels = ticks2ticklabels(Xticks,0);
xticks(Xticks)
xticklabels(Xticklabels)
By the way, why when I want to run the code in the browser it always says that "something went wrong. please try again"?
Thanks again!

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