Paste data from your spreadsheet into the text box at left. The first row must hold the column labels, which are then used to label the x and y axes. You may surround algebraic variables and Greek letters with dollar signs; e.g., $\theta$ (°) or $L$ (cm) or $T^2$ (s$^2$) or $L_{\rm string}$ (cm). Some characters are special and need to be escaped with a leading backslash, including #. If you run into trouble, try removing non alphanumeric characters from your column labels.

xlabel	ylabel	y uncertainties
1.23	2.54	0.2
2.34	4.25	0.15
3.73	7.72	0.32
5.13	8.17	0.2

Optional keys — separate pairs with commas

xmin	lower limit of x axis	xmin=0
ymin	lower limit of y axis	ymin=0
legend	Position of the legend ('south', 'north', 'east', 'west')	legend=east
log	change axis display to logarithmic	logx=True, logy=False
mask	omit points from a fit; pass 1 to omit point 0 to use; mask length should match data length	mask=100000
dpi	Resolution of the PNG image	dpi=600
format	Output format	format=pdf

If you would like to define your own fitting function to use with the Physics 50 Fitter, click here to download a zip archive with the code and an example Jupyter notebook that illustrates how to use it.