Beta version

Existing Datasets:

Dataset	Description	Number of total (x,y) points	Quantities evaluated between Xmin=0.0 and Xmax=0.0
			Number of (x,y) points	Ymin	Ymax	∫ y dx	∫ xy dx	∫ xy dx / ∫ y dx
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This part of Sigma allows to compute operations between different sets of (x,y) data points that are stored in the plot cart. A new set of (x,y) points, resulting in mathematical operations of other datasets, will be added to the plot cart using this feature. Examples: To plot the first dataset y column multiplied by 10, type 10*y0. To plot the log10 of the first dataset y column, type log(y0). Use ln( ) for loge. To plot the first dataset x column multiplied by its y column, type x*y0. To plot the integrand of a Maxwellian type averaged cross section, type y0*x*exp(-x/10000). To add the y columns for the first two datasets, type y0+y1. To plot the first dataset y column plus 10 times the second dataset y column type y0+10*y1. The new dataset x values are obtained as the union of all the datasets x values involved in the operation. The expression is then evaluated in y values obtained from linear interpolations. Warnings: At the moment, computations are restricted to cross sections (MF=3). Operations among datasets containing more than 10,000 actual points will take a long time to execute and the connection will be timed out. The precision of the integrals in the table is good as long as the integrand is linear.