Numerical Modelling in Fortran: day 2

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Some intrinsic mathematical functions • abs (absolute value, real or integer) • sqrt (square root) • sin, cos, tan, asin, acos, atan, atan2: assume angles are in radians • exp and log : log is natural log, use log10 for base 10. • also cosh, sinh, tanh • for full list see a manual
Some conversion functions • Int(a): round to smaller # (4.7->4; -4.6->-4) • Nint(a): nearest integer (4.7->5; -4.6->-5) • Floor(a): (4.7->4; -4.6->-5) • Ceiling(a): (4.7->5; -4.6->-4) • Float(i): integer -> real • Real(c): real part of complex • mod(a,b) is remainder of x-int(x/y)*y • max(a,b,c,….), min(a,b,c,…)
Page 1 and 2: Numerical Modelling in Fortran: day
Page 4 and 5: Miscellaneous things • Continuing
Page 6 and 7: Initialising variables • Always i
Page 10 and 11: ead(*,*) and write(*,*) • read(*,
Page 12 and 13: functions and subroutines • Usefu
Page 14 and 15: same thing as subroutines (less ele
Page 16 and 17: Example internal function
Page 18 and 19: A r r a y s
Page 20 and 21: Homework • At the ‘Fortran 90 T
Page 22 and 23: Exercise 2: Mean and standard devia
Page 24 and 25: Finite Difference grid in 1-D • G
Page 29 and 30: Analysis • Subroutine arguments c
Page 31: Exercise 3: Second derivative • W

Numerical Modelling in Fortran: day 2

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