Hi all,

I tried to fit my data (x,y) with a model by using Minimize the Chisquare. By example the model is y=a*x+b, Chisquare is (y-yexp)^2. And I performed a function Minimize(Chisquare) to have a and b.

I need to extract the error of parameter like a±aerror, and b±berror.

Thank you for your helps,

Best regards,

Hi,

I'm null in statistic. I'm doing a calculation to calculate a set of parameter. By example:

I have to calculate 5 parameters x1,x2,x3,x4,x5 from 7 equations f1,f2,f3,f4,f5,f6,f7. Because it is difficult to calculate directly 5 parameters, I used chisquare to minimize the difference between experimental and theorical data. Then, I can get the results. After that, I used these 5 parameters to back-calculate the data using 7 equations above. My question is about how to calculate the error bar (or standard error) of the back-calculate datato add to the plot.

Thank you  for helping me,

Best regards.

Hi,I'm using Maple 15. When I plot with the command

Aplot:= Plot2D(Q[2 .. 26, 13], Q[2 .. 26, 14], style = point, color = blue, symbol = solidcircle, symbolsize = 16, font = [Arial, Bold, 13], axes = box, axis = [thickness = 1, tickmarks = [5, subticks = 5]]);

There is the report of problem

Error, (in plot/options2d) unexpected axis suboption: thickness = 1

Thank you for helping me.