Matlab statsitics
Response to the following questions:
1. I need a good way to display error bars on a scatter plot. I have a set of x and y data, that I have attached as a text file along with y+err and y-err data (denoted +/-). The err values vary from point to point, and +err and -err are not necessarily the same.
2. I am using the data to get a slope and an intercept. Once I know. I need an easy way to calculate the errors in slope and intercept? (This may be more of a math question than a MatLab question, but I assume someone here knows the solution.)
Please do an example In full detail since I will be doing this for my physics lab reports for the next two months and I really need to know how to do proper linear regression using Matlab.
Also I need a Chi square test to verify that my fit is in fact good. Can you also please explain that .
2.0 4.220 +/- .005
1.8 3.819 +/- .005
1.6 3.415 +/- .005
1.4 3.010 +/- .004
1.2 2.604 +/- .004
1.0 2.201 +/- .003
0.8 1.794 +/- .003
0.6 1.387 +/- .003
0.4 0.981 +/- .002
o.2 0.578 +/- .001
0 0.185 +/- .001