| MATLAB Compiler | |
Square root for nonnegative real inputs.
Syntax
Y = realsqrt(X)
Description
realsqrt(X) returns the square root of the elements of X. The domain of realsqrt is the set of all nonnegative real numbers. If X is negative or complex, realsqrt issues an error message.
realsqrt is similar to sqrt; however, sqrt's domain is much broader than realsqrt's. The domain of sqrt includes all real and all complex numbers. Despite this larger domain, if Y is real, then you should use realsqrt rather than sqrt for two reasons.
First, subsequent access of Y may execute more efficiently if Y is calculated with realsqrt rather than with sqrt. Using realsqrt forces the MATLAB Compiler to impute a real type to X and Y. Using sqrt typically forces the MATLAB Compiler to impute a complex type to Y.
Second, the compiled version of realsqrt may run somewhat faster than the compiled version of sqrt. (However, the interpreted version of realsqrt may run somewhat slower than the interpreted version of sqrt.)
See Also
exp, log, log2, logm, log10, reallog, realpow
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