L+ L1,L2,K,L where K is label of an image line of the form " 12.123 12.1 1.123 " computes the sum of lines L1-L2 for the columns indicated by the numeric masks on the image line K and writes the sums on the line L acoording to the same images. L* L1,L2,K,L works as L+, but computes products. L- L1,L2,K,L computes the difference of lines L1 and L2 to line L. L/ L1,L2,K,L computes the ratio of lines L1 and L2 to line L. L% L1,L2,K,L computes the ratio of lines L1 and L2 in percentages to line L. L+log L1,L2,K,L computes the sums of the logarithms of lines L1-L2. Other functions available are: sqrt,exp,sin,cos,tan,arctan,int and abs. The same functions may be included in L-,L*,L/ and L% as well. T = More information on table management

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