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comment Using TimeSeriesForecast for forecasting the traffic growth
Is your problem in getting the data from the Google spreadsheet into Mathematica, or is your problem in the use of TimeSeriesForecast on the imported data?
Mar
20
comment Length of Union Incorrect?
@Jinxed: I guess it wasn't done for that reason here (see at the end of the comment), but Do[expression,{1}] at top level is a reliable way to prevent the value of the expression not only from output, but also from being stored in Out (if you just put a semicolon at the end, it doesn't get printed, but still gets stored in Out). Just writing Do[expression] (without the {1}) also works, but has the disadvantage that the syntax highlighter tells you there is a second argument missing. However assigning the resulting Null to ConnectingList doesn't seem meaningful.
Mar
20
revised Match opening and closing parentheses?
Added a note about the error handling
Mar
20
answered Match opening and closing parentheses?
Mar
19
comment Piecewise function output response interpretation
The function returns 0 if neither t >= 0 nor t <= 0. For example, if you define strange /: strange >= 0 = False; strange /: strange <= 0 = False you get a strange value which is neither >=0 nor <= 0. Consequently, if you evaluate your piecewise function with t=strange, you'll get 0 as result.
Mar
19
comment Why does this expression take a long time to evaluate?
Mathematica recognizes unsolvable problems (although that may also take time; also I think detecting all unsolvable problems is not possible in principle), but how is Mathematica supposed to know what you consider an unreasonable time? I might be interested enough in a solution that I'm willing to wait a week to get it. Note that you can tell Mathematica to stop after a certain time using TimeConstrained.
Mar
19
answered Problem with Replace function
Mar
19
answered Why are there a lot of input forms in Mathematica?
Mar
18
comment Printing names of indexed variables instead of values
Also With[{i=1},HoldForm[foo[i]]] works. As does i=1;With[{i=i},HoldForm[foo[i]]].