choose the limit of two y axes

I would like to do a graph with two y axes. I have found this. I have two questions that have no answer here:

1.how to have the two axes simply in black and not in blu and orange (very strange default choice).

2.How can I choose the limit of each axes? I usually use ylim([]), but now how can I choose the right or left axis?

Thank you

Answer 1

[KSSV]

x = linspace(0,25);
y = sin(x/2);
yyaxis left ;
plot(x,y,'k');
ax(1) = gca ;

r = x.^2/2;
yyaxis right
plot(x,r);
ax(2) = gca ;

% change axis colors
ax(1).YColor = 'g' ;
ax(2).YColor = 'm' ; 

ax(1).YLim  % set your value here 

ans = 1×2

0 350

ax(2).YLim  % set your value here

ans = 1×2

0 350

[SYML2nd]

It does not work, because I want both black, and if with your code you do

% change axis colors

ax(1).YColor = 'k' ;

ax(2).YColor = 'k' ;

One became by default blue. Furthermore I still don't know how to limit each axis for example the right from -2 to 2 and the left from 0 to 500.

[KSSV]

figure
x = linspace(0,25);
y = sin(x/2);

yyaxis left
plot(x,y)

r = x.^2/2;
yyaxis right
plot(x,r)

ax = gca;
ax.YAxis(1).Color = 'k';
ax.YAxis(2).Color = 'k';

[SYML2nd]

Ok. thank you @KSSV. I obtained the two axes in black, but how to choose their limits now? Furthermore I also would like to choose every tick of the axis

[KSSV]

Try using ylim after the plot twice.