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ABS
| Returns the absolute value of X. |
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CEIL
| Returns the closest integer greater than or equal to X. |
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CIR_3PNT
| Returns radius and center of circle, given 3 points. |
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COMPLEXROUND
| Rounds a complex array. |
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DIAG_MATRIX
| Constructs a diagonal matrix from an input vector, or if given a matrix, then extracts a diagonal vector. |
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DIST
| Creates array with each element proportional to its frequency. |
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EXP
| Returns the natural exponential function of given expression. |
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FLOOR
| Returns closest integer less than or equal to argument. |
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IDLUNIT
| Performs basic dimensional analysis, conversions, and mathematical operations, all while factoring units. |
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ISHFT
| Performs integer bit shift. |
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MATRIX_MULTIPLY
| Calculates the IDL matrix-multiply operator (#) of two (possibly transposed) arrays. |
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MATRIX_POWER
| Computes the product of a matrix with itself. |
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PNT_LINE
| Returns the perpendicular distance between a point and a line. |
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POLY_AREA
| Returns the area of a polygon given the coordinates of its vertices. |
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PRIMES
| Computes the first K prime numbers. |
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PRODUCT
| Returns the product of elements within an array. |
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ROUND
| Returns the integer closest to its argument. |
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SPH_4PNT
| Returns center and radius of a sphere given 4 points. |
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SQRT
| Returns the square root of X. |
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VOIGT
| Calculates intensity of atomic absorption line (Voight) profile. |