How to begin with multiple graphs of 'y(x+1)=y(​x)+0.02*ra​ndn;' from x=1? i.e. 10 graphs?

a=0;
b=100;
c=0;
y=a+(b-a).*rand;
for x=1:365
y(x+1)=y(x)+0.02*randn;
if y(x+1)>100
y(x+1)=y(x)
else if y(x+1)<0
c=c+1
break
end
plot(y)
c
end
end

Answer 1

[Chris Perkins]

Hi Karolina,

If I understand your question correctly, you want multiple graphs created, and then to plot your function on all of them.

You can create multiple figures, and store a handle to the axes for each, you can then later use that axes handle to plot on the graph of that specific figure.

Here's your code, with a few lines that I have added to show how you can accomplish this:

a=0;
b=100;
c=0;
y=a+(b-a).*rand;

% Added Code 
axisHandles = [];
for i=1:10
    figure
    axisHandles(i) = gca;
end
% End Added Code

for x=1:365
    y(x+1)=y(x)+0.02*randn;
    if y(x+1)>100
        y(x+1)=y(x)
    else if y(x+1)<0
        c=c+1
        break
        end

      % Adjusted Code
      for i=1:10
          plot(axisHandles(i),y);
      end
      % End Adjusted Code

      c
      end
  end

If you wanted different plots on each graph, you can change the second section of added code to plot a different function on each graph.

Alternatively, if you wanted all of these graphs in the same figure, you could use the "subplot" command, as described in the following documentation page:

https://www.mathworks.com/help/matlab/ref/subplot.html?s_tid=doc_ta

[Karolina]

I apologize for asking unclearly, I wasn't sure how to put this into words. I mean to ask, how to plot ten different results on same figure?

[Karolina]

Here is what I tried but doesn't seem to work

a=0;
b=100;
c=0;
y_i=a+(b-a).*rand;
for i=1:10
for x=1:365
    y_i(x+1)=y_i(x)+0.02*randn;
    if y_i(x+1)>100
        y_i(x+1)=y_i(x)
    else if y_i(x+1)<0
        c=c+1
        break
        end
      plot(y_i)
      end
  end
end