range of value with doing calculation

I just started using matlab two days before, I have a simple question regarding the calculation while using range of value with a constant. I encountered issue while doing this calculation.

x=0:1:50;
i=0.5;
y=abs(x-i);

as I know the values saved in matlab are all in the form of matrices, and the x is varied from [0,1,2,3,4,...,50] and it is a 1X51 matrix, and i is a 1x1 matrix, while I found that under the work space the y is also 1X1 matrix. Therefore, this is the reason why when I tried to plot the graph x-y, it appears only a dot, because the y is only 1 element inside.

Could anyone please show me the correct way to plot the graph and make sure the y is also a 1x51 matrix?

[Walter Roberson]

>> x=0:1:50;
i=0.5;
y=abs(x-i);
>> size(y)

ans =

     1    51

y is a vector the same size as x.

The exception would be if there was some third-party abs.m on your path that was interfering with the Mathworks abs() function. To check that, see what shows up for

     which abs(1)

You should see something along the lines of

 toolbox/matlab/elfun/@double/abs %double method

if you see a .m file listed instead that that file is causing you problems.

[Wei Chuang Lee]

Oh yeah, I tried to restart that matlab and it appears normal... I am not sure why did the system show it incorrectly earlier...

Thank you so much!