DTSg v1.1.1

• Column names can often now be additionally specified by a character string containing either comma separated column names, for example, "x,y,z", or the start and end column separated by a colon, for example, "x:z".
• Fixed a bug in interpolateLinear() causing partial last observation carried forward behaviour when its roll argument was specified smaller than the size of the gap to be interpolated.
• Fixed a bug in interpolateLinear() causing partial interpolation in certain cases when its roll argument was specified smaller than the size of the gap to be interpolated.
• Slightly improved documentation.