import_data_and_extr.mw   @epostma 

thanks, i tried what you said. and code attached. why when i try to obtained an array with two columns, it did not give me the pattern like you have " Data:=[[specfic values]....]]?"

even with Fit, it gives the same outcome.

does it has anything to do with my input mode?import_data_and_extr.mw 

import_data_and_extr.mw   @epostma 

thanks, i tried what you said. and code attached. why when i try to obtained an array with two columns, it did not give me the pattern like you have " Data:=[[specfic values]....]]?"

even with Fit, it gives the same outcome.

does it has anything to do with my input mode?import_data_and_extr.mw 

plot_and_fit.mw

thanks for your help, it worked after converting to 1-D math. next step i am trying to plot the data and get a nonlinear fit for the data.

I used the following code:

pp := pointplot(X, Y, symbolsize = 25, color = blue);

ans1 := NonlinearFit(a*x^n+b*x+c, X, Y, x);

p1:=plot(asw1,x=0..10):

however, it did not return to me the plot, nor the fitted function.(see attached)plot_and_fit.mw

Don't know what is wrong. sorry i do need instruction for single steps....

plot_and_fit.mw

thanks for your help, it worked after converting to 1-D math. next step i am trying to plot the data and get a nonlinear fit for the data.

I used the following code:

pp := pointplot(X, Y, symbolsize = 25, color = blue);

ans1 := NonlinearFit(a*x^n+b*x+c, X, Y, x);

p1:=plot(asw1,x=0..10):

however, it did not return to me the plot, nor the fitted function.(see attached)plot_and_fit.mw

Don't know what is wrong. sorry i do need instruction for single steps....

i only pasted a small portion of data, however, how do i use long columns of x amd y data saved in an excel file? i cannot type, there are hundreds of them. thanks.

i only pasted a small portion of data, however, how do i use long columns of x amd y data saved in an excel file? i cannot type, there are hundreds of them. thanks.

i hope you could kindly tackle the problem i had.

Download error.mw

see title

i was trying to copy new data and replace the data in the bracket in the x vector, but it keeps returning error. what shall i do?

i was trying to copy new data and replace the data in the bracket in the x vector, but it keeps returning error. what shall i do?

sorry, X Y were out of alignment in the previous thread. X is:

Y is:

sorry, X Y were out of alignment in the previous thread. X is:

Y is: