Graph scaling and lin/log control
Here you can choose the scaling of the data
plots and the 3D scatterplots.
Log plots require data values greater than zero.
| X Scale (2D Only) | | Y Scale (2D Only) | | Z Scale (2D Only) |
| | | | |
Animation and Graph size
Here you can choose the size of the graphs. Smaller size files load quickly,
with less resolution while large files show more resolution but load more slowly.
Hold Coefficients Constant
Here you can enter values to hold coefficients constant during fitting.
Leave the entry field blank to let the coefficient fit normally.
Note that coefficient bounds are overridden by holding a coefficient constant.
z = a + b*ln(x) + c*ln(y) + d*ln(x)
2 + f*ln(y)
2 + g*ln(x)
3 + h*ln(y)
3 + i*ln(x)*ln(y) + j*ln(x)
2*ln(y) + k*ln(x)*ln(y)
2 Estimated Initial Coefficients
Here you can enter values for initial parameter estimates.
Few users will need this section, as the site estimates initial
parameters using the Differential Evolution genetic algorithm
for both non-linear equations and non-Gaussian fitting targets.
z = a + b*ln(x) + c*ln(y) + d*ln(x)
2 + f*ln(y)
2 + g*ln(x)
3 + h*ln(y)
3 + i*ln(x)*ln(y) + j*ln(x)
2*ln(y) + k*ln(x)*ln(y)
2 Coefficients Bounds
Here you can enter coefficient upper and lower bounds. Leave the
entry fields blank to let the coefficients fit without bounds.
Note that holding a coefficient constant overrides these bounds.
z = a + b*ln(x) + c*ln(y) + d*ln(x)
2 + f*ln(y)
2 + g*ln(x)
3 + h*ln(y)
3 + i*ln(x)*ln(y) + j*ln(x)
2*ln(y) + k*ln(x)*ln(y)
2 