I need to plot my data in log10 y scale. Most of my data points are positive and some time they contain some negative value points. I need the program simply ignore those negative points and plot positive as usual. Origin 7's line and line + symbol plot did a nice job on it! However, when I load the same file into the new Origin 8, I found that the line is all over the log plot and it seems Origin 8 get confuse with the negative values. Similiar thing happen in line + symbol plot, the line will mis-connect many positive points where negative values exist amound them.
Can anyone kindly help me with this issue? |