[Tutor] math description
Hello, i would like to know how to write a formula that in excell looks like this: A / EXP(-LN(2) * t) -- greetings car kuzma ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] math description
On 29/08/2012 21:20, damjan kuzmic wrote: Hello, i would like to know how to write a formula that in excell looks like this: A / EXP(-LN(2) * t) ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor Start here http://docs.python.org/tutorial/ -- Cheers. Mark Lawrence. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] math description
On 29/08/12 21:20, damjan kuzmic wrote: Hello, i would like to know how to write a formula that in excell looks like this: A / EXP(-LN(2) * t) Start by breaking it down from the inside out. LN(2) is log(2) in Python, which is found in the math module so you need import math too. negation ( -LN() ) and multiplication are builtin (* t) EXP() is exp(), also in the math module. division is built in (although I'm not sure if Excel / is integer or 'real' division, given the nature of the values I'll assume its real... So the final expression should look like import math ... value = A/math.exp(-math.log(2) * t) Which isn't too different to Excel. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] math description
damjan kuzmic wrote: i would like to know how to write a formula that in excell looks like this: A / EXP(-LN(2) * t) import math A = 1.23 t = 4.56 Literally (math.log is the natural logarithm): A / math.exp(-math.log(2) * t) 29.013618196288864 However, exp(-x) == 1 / exp(x) and exp(ln(a)*x) == a ** x so you better spell it A * 2 ** t 29.013618196288864 ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
