exp(x)
Exponential function
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sin(x)
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log(x)|
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Natural logarithm
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tan(x)
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log10(x)
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Common logarithm
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acos(x)
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cos−1(x)
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abs(x)
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Absolute value
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asin(x)
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sin−1(x)
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angle(x)
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Phase of a complex number (rad)
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atan(x)
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‐π/2 ≤ tan−1(x) ≤ π/2
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sqrt(x)
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Square root
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atan2(y,x)
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‐π ≤ tan−1(y/x) ≤ π
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real(x)
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Real part
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cosh(x)
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(ex + e−x)/2
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imag(x)
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Imaginary part
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sinh(x)
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(ex − e−x)/2
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conj(x)
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Complex conjugate
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tanh(x)
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(ex − e−x)/(ex + e−x)
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round(x)
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The nearest integer (round‐off)
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acosh(x)
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cosh−1(x)
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fix(x)
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The nearest integer toward 0
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asinh(x)
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sinh−1(x)
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floor(x)
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The greatest integer ≤x
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atanh(x)
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tanh−1(x)
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ceil(x)
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The smallest integer ≥x
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max
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Maximum and its index
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sign(x)
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1 (positive)/0/−1 (negative)
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min
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Minimum and its index
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mod(y,x)
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Remainder of y/x
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sum
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Sum
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rem(y,x)
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Remainder of y/x
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prod
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Product
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eval(f)
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Evaluate an expression
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norm
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Norm
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feval(f,a)
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Function evaluation
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sort
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Sort in the ascending order
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polyval
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Value of a polynomial function
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clock
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Present time
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poly
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Polynomial with given roots
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find
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Index of element(s) satisfying given condition
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roots
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Roots of polynomial
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flops(0)
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Reset the flops count to zero
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tic
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Start a stopwatch timer
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flops
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Cumulative # of floating point operations (no longer available)
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toc
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Read the stopwatch timer (elapsed time from tic)
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date
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Present date
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magic
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Magic square
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Reserved variables with special meaning
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i, j
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pi
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π
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eps
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Machine epsilon
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Inf, inf
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Largest number (∞)
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realmax, realmin
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Largest/smallest positive number
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NaN
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Not_a_Number (undetermined)
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end
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The end of for‐loop or if, while, case statement or an array index
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break
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