How to convert cell array elements into one string, where elements are separated by comma

Hello,

I asked a solution for this problem, but I mistook the answer for good one, while I actually needed something slightly different. So I'll repeat myself a little bit again. I have a cell array which is:

legend_names(:)

ans =

    '0.7 < T Days < 44.2'
    '44.4 < T Days < 379.6'
    '380.9 < T Days < 937.7'
    '952.7 < T Days < 5040.0'

But I need this output to be one continuous string, where cell elements are separated with commas so I could use it to plot legend.

legend(histo_objects, legend_names(:)); Here histo_objects is 1xN line with saved plots.

I need result to be:

legend_names(:) = '0.7 < T Days < 44.2', '44.4 < T Days < 379.6', '380.9 < T Days < 937.7', '952.7 < T Days < 5040.0'

And I can't seem to get it.

(No comma after last one).

EDIT: I came up with some kind of solution myself, and it looks like this:

names = []; q = char(39); for i = 1:S

    if i == 1
        names = [ q legend_names{i} q ',' q];
    elseif i < S
        names = [ names legend_names{i} q ',' q];
    elseif i == S
        names = [ names legend_names{i} q ];
    end

end

legend(plot_objects,names(:)');

Where:

names(:)'

ans =

'0.7 < T Days < 6.1','6.3 < T Days < 30.1','30.1 < T Days < 131.1','131.1 < T Days < 324.0','324.0 < T Days < 443.4','443.4 < T Days < 643.3','643.3 < T Days < 1027.0','1008.0 < T Days < 1770.0','1749.8 < T Days < 5040.0'

However, it does not work. It plots only one legend with all of chars in it. If I just copy text from names and write it manually into legend- it works. Why is it so ? Is there an easy way to get what I want with this result ?

[Martynas Subonis]

Solved problem. Legend takes cell array of size 1xN. Cell array was simply created by:

for i = 1:S

    period_matrix = Split_data_groups{i};
    legend_names{i} = sprintf('%0.1f%s%0.1f', min(period_matrix(:,1)),' < T Days < ', max(period_matrix(:,1)));

end

There was no need for commas for this problem to begin with (apparently).

[Star Strider]

You don’t need the loop. My code does the same thing — efficiently — in three lines without a loop.

Answer 1

[Star Strider]

Does this do what you want?

Example code:

v = [0.7, 44.2; 44.4, 379.6; 380.9 937.7; 952.7, 5040.0];
LegStr  = sprintf('%.1f < T Days < %.1f\n', v');
LegCell = regexp(LegStr, '\n', 'split');

x = linspace(0, 10);

figure(1)
plot(x, 1+2*x+0.1*randn(size(x)))
hold on
plot(x, 2-0.5*x+0.1*randn(size(x)))
plot(x, 5+0.1*x+0.1*randn(size(x)))
plot(x, -1+5*x+0.1*randn(size(x)))
hold off
grid
legend(LegCell(1:end-1))