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I'm trying to do a linear regression between the columns of matrices. In example below I want to regress column 1 of matrix xdat with column1 of ydat and do a separate regression between the column 2s of each matrix. But the output I get seems to give correct slopes but incorrect intercepts and another set of slopes with value NA. How do I do this correctly? I'm after the slope and

Hi, I'm using the mfrow parameter in par() to plot several timeseries with a common time x axis as a sequence of plots one below the other. I reduced the top and bottom margins to zero to get a very nice looking plot but sometimes the labels on the y axes from one plot overlap with the y axis labels on the plot above or below. Any ideas how I can prevent this without losing the look of the