dataTypeIndex is defined ambiguously

[MichaelUM]

The dataTypeIndex is not clearly defined. In the data format summary it is defined as an <i> integer but in the text description it states Data-type specific parameter indices and Note that the Time Domain and Diffuse Correlation Spectroscopy data types have two additional parameters and so the data type index must be a vector with 2 elements that index the additional parameters. Also here the type needs to be changed from Type: integer to Type: numeric 1-D array.