> Unfortunately all we have at work is Excel, which is a fairly poor > plotting package, which is no surprise as it is a good spreadsheet.
I recommend Octave which is a Matlab-compatible Free software (includes a Windows version, also Free, of course). It's not as easy to input data into it as Excel, but once you have the data in it, it's a blast. It's an array language, i.e. x+y adds up every pair of components of x and y, and plot(sin(x)) plots the entire function. As I am writing it, I am fitting some data I got from a plot of C vs V for ceramic capacitors---yes, their capacitance changes with voltage quite dramatically, down to 10% of initial value for large caps towards the top of their rated voltage range. I got the data from a published plot, and in Octave, fitting a third-order polynomial is as simple as polyfit(x,y,3), and plotting the resulting data is plot(x,y,'+',polyval(polyfit(x,y,2),x)) ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
