# Operations¶

These POST26 commands are used to perform operations on the stored variables.

 `Mapdl.abs`([ir, ia, name, facta]) Forms the absolute value of a variable. `Mapdl.add`([ir, ia, ib, ic, name, facta, ...]) Adds (sums) variables. `Mapdl.atan`([ir, ia, name, facta]) Forms the arctangent of a complex variable. `Mapdl.clog`([ir, ia, name, facta, factb]) Forms the common log of a variable `Mapdl.conjug`([ir, ia, name, facta]) Forms the complex conjugate of a variable. `Mapdl.deriv`([ir, iy, ix, name, facta]) Differentiates a variable. `Mapdl.exp`([ir, ia, name, facta, factb]) Forms the exponential of a variable. `Mapdl.filldata`([ir, lstrt, lstop, linc, ...]) Fills a variable by a ramp function. `Mapdl.imagin`([ir, ia, name, facta]) Forms an imaginary variable from a complex variable. `Mapdl.int1`([ir, iy, ix, name, facta, factb, ...]) Integrates a variable. `Mapdl.large`([ir, ia, ib, ic, name, facta, ...]) Finds the largest (the envelope) of three variables. `Mapdl.nlog`([ir, ia, name, facta, factb]) Forms the natural log of a variable. `Mapdl.prod`([ir, ia, ib, ic, name, facta, ...]) Multiplies variables. `Mapdl.quot`([ir, ia, ib, name, facta, factb]) Divides two variables. `Mapdl.realvar`([ir, ia, name, facta]) Forms a variable using only the real part of a complex variable. `Mapdl.small`([ir, ia, ib, ic, name, facta, ...]) Finds the smallest of three variables. `Mapdl.sqrt`([ir, ia, name, facta]) Forms the square root of a variable.