Passing variables to plot function

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Hari
Hari 2016-4-13
评论： Muhammad Usman Saleem 2016-4-15
I have the following plot function
plot([2,7],[3,3],'lineWidth', 40);
Instead of [2,7], I want to pass two variables d1 and d2 that has a set of values stored in it. Can someone please help me with that?

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回答（2 个）

dpb
dpb 2016-4-13
Well, it would seem pretty straightforward,
plot(d1,d2,'lineWidth', 40);
assuming X, Y values are in d1, d2, respectively, and they're the same length vectors.
See
doc plot % for details on using it
  2 个评论
Hari
Hari 2016-4-13
Thanks a lot! but the Y value is constant. The two values in X are stored as array of values in two variables. If suppose d1 and d2 has arrays of values then, passing them would look like
plot([d1,d2],[3,3],'lineWidth', 40);
I am sure this won't work!
dpb
dpb 2016-4-13
I'm sure I don't understand from the description. What are the sizes of the various variables and what do you actually want plotted?
The general answer is that plot expects an X and Y array of commensurate length; if vectors orientation doesn't matter. You can do whatever manipulations you need with the variables to build the desired X and Y, plot doesn't care how you write the arrays as long as it is valid syntax that could be written to store the result as a variable.

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Muhammad Usman Saleem
编辑：Muhammad Usman Saleem 2016-4-13
let see it what you want
>> d1=[1 3 5 6] % create a vector as x for plot
d1 =
1 3 5 6
>> d2=[4 5 0 10] % create a vector as y for plot
d2 =
4 5 0 10
>> plot(d1,d2,'lineWidth', 40);
do not use [] in d1 and d2
here is the output plot,
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Hari
Hari 2016-4-15
编辑：Hari 2016-4-15
I am actually done with it now!! This is my code
d1=xlsread('datafile.xlsx','R69:R76');
d2=xlsread('datafile.xlsx','T69:T76');
plot([d1,2],[3,3],'lineWidth', 40,'color',[1 0 0]);
Thanks a lot!
Muhammad Usman Saleem
Muhammad Usman Saleem 2016-4-15
good then please accept answer for reputation.

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