**svdfittable** - linear coefficient fit of a set of basis functions to a dependent column.

svdfittable[-m 'modelspec']column[col...]

**svdfittable** fits a set of model functions to the data in *column*. The
model is a comma separated list of basis functions. **svdfittable** computes
a linear coefficient for each basis function to provide the best fit sum to
the dependent variable column. Each basis function in the model is
evaluated as an awk expression which may contain table column names and
header values. The columns of the table used in the basis function
expressions are the independent variables of the fit. More than one
dependent variable column may be given and an independent fit will be
performed for each. See slaSvd @{slaSvdcov,
slalib/slaSvdcov.3.html} slaSvdsol

- -m
*model**spec*Provide a model to fit. A comma separated list of basis functions.

A simple linear fit of measured data in column Y to actual position column X. The first line of the example uses jottable to creates some data to fit. The second line fits the data withsvdfittableand then neatens up the output table withjustifyjohn@panic : jottable X 5 | column -a Y | compute 'Y = X + gresid(.1)' > foo.tab john@panic : svdfittable < foo.tab -m '1, X' Y | justify svdfittable Model 1, X RMS for each column fit: RMS_Y 0.012060 Coefficients for each column fit: C_Y -0.0646272 0.991883 Y Fit_Y Res_Y -------- -------- --------- 0.941286 0.927256 -0.014030 1.907160 1.919138 0.011978 2.895200 2.911021 0.015821 3.914360 3.902904 -0.011456 4.897100 4.894787 -0.002313

- xyfittable - Fit one pair of X, Y columns to another pair with a linear model of translation, scale and optional shear.
- simplexfittable - coefficient fit of a an expression to a dependent column.
- starbase.1 starbase data table introduction.
- starbase.3 starbase data table C library.
- starbase.5 starbase data table file format.

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