How to get xticklabels from xticks by merging cells?

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

Answer 1

[Chunru]

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)

Answer 2

[Mathieu NOE]

hello

here you are my friend :

Xticks = [1,2,3];
tmp = num2str(Xticks);
Xtickslabels{1} = tmp;

Answer 3

[Louis Tomczyk]

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

[Mathieu NOE]

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]

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!