pgfplots - A TeX package to draw normal and/or logarithmic plots directly in TeX in two and three dimensions with a user-friendly interface and pgfplotstable - a TeX package to round and format numerical tables. Examples in manuals and/or on web site.
According to the documentation, the coordinate system inside scatter/@pre marker code is transformed such that (0,0) is the plot coordinate. However, this does not seem to be the case.
There's an additional offset. From playing around with the function a bit it seems like, modulo some rounding/imprecision, the offset is (xmin, ymin), where xmin (ymin) is the minimum of the data's x (y) coordinates.
After playing around a bit more, it seems like error bars also feed into (xmin, ymin), so it's probably just the minimum of the data ranges (i.e. the lower left corner of the data area).
According to the documentation, the coordinate system inside
scatter/@pre marker code
is transformed such that(0,0)
is the plot coordinate. However, this does not seem to be the case.There's an additional offset. From playing around with the function a bit it seems like, modulo some rounding/imprecision, the offset is (xmin, ymin), where xmin (ymin) is the minimum of the data's x (y) coordinates.