nanclip

dataout = nanclip(datain) and dataout = nanclip(datain,pendowncmd) return the pen-down delimited data in the matrix datain as NaN-delimited data in dataout. When the first column of datain equals pendowncmd, a segment is started and a NaN is inserted in all columns of dataout. The default pendowncmd is -1.

Pen-down delimited data is a matrix with a first column consisting of pen commands. At the beginning of each segment in the data, this first column has an entry corresponding to a pen-down command. Other entries indicate that the segment is continuing. NaN-delimited data consists of columns of data, each segment of which ends in a NaN in every data column. Since there is no pen command column, the NaN-delimited format can represent the same data in one fewer columns; the remaining columns have more entries, one for each NaN (that is, for each segment).