# Graph not showing plots

2 views (last 30 days)
Takura Nyatsuro on 5 Oct 2022
Commented: Star Strider on 5 Oct 2022
im trying to plot a graph but nothing is showing up. Not sure if its due to the for loop or not as i have tried to put values into an array but it shows an error saying matrix dimensions must agree. Any help and explanation would be appreciated.
clear;
hold on
grid on
g=9.8;
for m=60:70
y=(14*35)/(m.*g);
end
plot(m,y)

KSSV on 5 Oct 2022
clear;
g=9.8;
m=60:70
m = 1×11
60 61 62 63 64 65 66 67 68 69 70
y=(14*35)./(m.*g);
plot(m,y)
grid on Takura Nyatsuro on 5 Oct 2022
ah i see, completely forgot to add the "." to the numerator in the function, thank you

KSSV on 5 Oct 2022
If you want to use loop, you need to use a marker to show up the plot.
clear;
hold on
grid on
g=9.8;
for m=60:70
y=(14*35)/(m.*g);
plot(m,y,'.')
end Takura Nyatsuro on 5 Oct 2022
great, thank you

Star Strider on 5 Oct 2022
The loop is not necessary. However if you choose to use it, the variables must be subscripted in order to save them to vectors —
% clear;
figure
hold on
grid on
g=9.8;
for m=60:70
mv (m-59) = m;
y(m-59)=(14*35)/(m.*g);
end
plot(mv,y) % clear;
figure
hold on
grid on
g=9.8;
m=60:70;
y=(14*35)./(m.*g);
plot(m,y) Without the loop, using element-wise division (./) instead of (/) is necessary.
.
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Star Strider on 5 Oct 2022
My pleasure!