why is my plot not working
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Colby Jennings
il 15 Apr 2021
Commentato: Colby Jennings
il 15 Apr 2021
I have copied the format of plot code directly, but it doesnt like my equation. I have tried everything I know please help, im dying.
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/584376/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/584381/image.png)
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David Hill
il 15 Apr 2021
t=1:10;
F=1./(4.^t)-1./(5.^t);
plot(t,F);
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Daniel Pollard
il 15 Apr 2021
This works because of the . used before each operation. In your code, you tried
1/4^x
which the matlab code interprets as you trying to raise a number (4) to the power of a vector, x. That doesn't really work in normal mathematics, and MATLAB would have thrown an error.
David's code instead writes
1/4.^x
which MATLAB reads to mean "for each element xi in x, calculate 1/4^xi". This is what you intended and is the usual way of calculating values for plotting.
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