creating graphs from loops

i have two equations that require a loop to solve them. i need to create a graph from the loop with both equations on the same axis. however every time i attempt to do this each value in the loop is overwritten and so the graph on has one point. how do i save each point in the loop. the graph needs to be (y1 y1, m)

for m = (60:70)
y1 = (14*35)/(m*9.8)
y2 = (1 - exp((-14*7)/m
end

Answer 1

[Turlough Hughes]

Hi Georgia,

You actually dont need a loop at all. You can get the answer easily using piecewise multiplication and division instead:

m=60:70;

y1=(14*35)./(m.*9.8);
y2=1-exp((-14*7)./m);

figure(), plot(m,y1,m,y2), legend('y1','y2')

I made the same assumptions about parentheses as the cyclist and that you want to plot y1 and y2 against m.

Answer 2

[the cyclist]

Here is one way that I typically solve that:

mrange = 60:70;

mcount = numel(mrange);

y1 = zeros(mcount,1);
y2 = zeros(mcount,1);

for mi = 1:mcount
    y1(mi) = (14*35)/(mrange(mi)*9.8);
    y2(mi) = (1 - exp((-14*7)/mrange(mi)));
end

figure
plot(mrange,y1,mrange,y2)

Note that your line of code for y2 had syntax errors with mismatched parentheses, which I corrected without much thought to what you intended to calculate there.