Revisions to Calculate the inverse of factorial

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edited Mar 8, 2014 at 13:41

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MATLAB 54 47

If I pick the right challenges MATLAB is really nice for golfing :). In my code I find the solution to the equation (u-x!)=0 in which u is the user input, and x the variable to solve. This means that u=6 will lead to x=3, etc...

@(x)fsolve(@(y)u-quad(@(x)x.^y./exp(x),0,99),1)

The accuracy can be changed by altering the upper limit of the integral, which is set at 99. Lowering this will change the accuracy of the output as follows. For example for an input of 10:

upper limit = 99; answer = 3.390077650833145;
upper limit = 20; answer = 3.390082293675363;
upper limit = 10; answer = 3.402035336604546;
upper limit = 05; answer = 3.747303578099607;

etc.

MATLAB 54 47

If I pick the right challenges MATLAB is really nice for golfing :). In my code I find the solution to the equation (u-x!)=0 in which u is the user input, and x the variable to solve. This means that u=6 will lead to x=3, etc.

@(x)fsolve(@(y)u-quad(@(x)x.^y./exp(x),0,99),1)

The accuracy can be changed by altering the upper limit of the integral, which is set at 99. Lowering this will change the accuracy of the output as follows. For example for an input of 10:

upper limit = 99; answer = 3.390077650833145;
upper limit = 20; answer = 3.390082293675363;
upper limit = 10; answer = 3.402035336604546;
upper limit = 05; answer = 3.747303578099607;

etc.

MATLAB 54 47

If I pick the right challenges MATLAB is really nice for golfing :). In my code I find the solution to the equation (u-x!)=0 in which u is the user input, and x the variable to solve. This means that u=6 will lead to x=3, etc...

@(x)fsolve(@(y)u-quad(@(x)x.^y./exp(x),0,99),1)

The accuracy can be changed by altering the upper limit of the integral, which is set at 99. Lowering this will change the accuracy of the output as follows. For example for an input of 10:

upper limit = 99; answer = 3.390077650833145;
upper limit = 20; answer = 3.390082293675363;
upper limit = 10; answer = 3.402035336604546;
upper limit = 05; answer = 3.747303578099607;

etc.

deleted 4 characters in body

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edited Mar 7, 2014 at 13:11

mmumboss

580
2
7

MATLAB 54 47

If I pick the right challenges MATLAB is really nice for golfing :). In my code I find the solution to the equation (u-x!)=0 in which u is the user input, and x the variable to solve. This means that u=6 will lead to x=3, etc.

@(ux)fsolve(@(y)u-quad(@(x)x.^y./exp(x),0,99),1)

The accuracy can be changed by altering the upper limit of the integral, which is set at 99. Lowering this will change the accuracy of the output as follows. For example for an input of 10:

upper limit = 99; answer = 3.390077650833145;
upper limit = 20; answer = 3.390082293675363;
upper limit = 10; answer = 3.402035336604546;
upper limit = 05; answer = 3.747303578099607;

etc.

MATLAB 54 47

If I pick the right challenges MATLAB is really nice for golfing :). In my code I find the solution to the equation (u-x!)=0 in which u is the user input, and x the variable to solve. This means that u=6 will lead to x=3, etc.

@(u)fsolve(@(y)u-quad(@(x)x.^y./exp(x),0,99),1)

The accuracy can be changed by altering the upper limit of the integral, which is set at 99. Lowering this will change the accuracy of the output as follows. For example for an input of 10:

upper limit = 99; answer = 3.390077650833145;
upper limit = 20; answer = 3.390082293675363;
upper limit = 10; answer = 3.402035336604546;
upper limit = 05; answer = 3.747303578099607;

etc.

MATLAB 54 47

If I pick the right challenges MATLAB is really nice for golfing :). In my code I find the solution to the equation (u-x!)=0 in which u is the user input, and x the variable to solve. This means that u=6 will lead to x=3, etc.

@(x)fsolve(@(y)u-quad(@(x)x.^y./exp(x),0,99),1)

The accuracy can be changed by altering the upper limit of the integral, which is set at 99. Lowering this will change the accuracy of the output as follows. For example for an input of 10:

upper limit = 99; answer = 3.390077650833145;
upper limit = 20; answer = 3.390082293675363;
upper limit = 10; answer = 3.402035336604546;
upper limit = 05; answer = 3.747303578099607;

etc.

deleted 2 characters in body

Source Link

edited Mar 7, 2014 at 12:57

mmumboss

580
2
7

MATLAB 54 4947

If I pick the right challenges MATLAB is really nice for golfing :). In my code I find the solution to the equation (u-x!)=0 in which u is the user input, and x the variable to solve. This means that u=6 will lead to x=3, etc.

@(u)fsolve(@(y)u-quadgkquad(@(x)x.^y./exp(x),0,99),1)

The accuracy can be changed by altering the upper limit of the integral, which is set at 99. Lowering this will change the accuracy of the output as follows. For example for an input of 10:

upper limit = 99; answer = 3.390077650833145;
upper limit = 20; answer = 3.390082293675363;
upper limit = 10; answer = 3.402035336604546;
upper limit = 05; answer = 3.747303578099607;

etc.

MATLAB 54 49

If I pick the right challenges MATLAB is really nice for golfing :). In my code I find the solution to the equation (u-x!)=0 in which u is the user input, and x the variable to solve. This means that u=6 will lead to x=3, etc.

@(u)fsolve(@(y)u-quadgk(@(x)x.^y./exp(x),0,99),1)

The accuracy can be changed by altering the upper limit of the integral, which is set at 99. Lowering this will change the accuracy of the output as follows. For example for an input of 10:

upper limit = 99; answer = 3.390077650833145;
upper limit = 20; answer = 3.390082293675363;
upper limit = 10; answer = 3.402035336604546;
upper limit = 05; answer = 3.747303578099607;

etc.

MATLAB 54 47

If I pick the right challenges MATLAB is really nice for golfing :). In my code I find the solution to the equation (u-x!)=0 in which u is the user input, and x the variable to solve. This means that u=6 will lead to x=3, etc.

@(u)fsolve(@(y)u-quad(@(x)x.^y./exp(x),0,99),1)

The accuracy can be changed by altering the upper limit of the integral, which is set at 99. Lowering this will change the accuracy of the output as follows. For example for an input of 10:

upper limit = 99; answer = 3.390077650833145;
upper limit = 20; answer = 3.390082293675363;
upper limit = 10; answer = 3.402035336604546;
upper limit = 05; answer = 3.747303578099607;

etc.

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edited Mar 7, 2014 at 12:49

mmumboss

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edited Mar 7, 2014 at 11:14

mmumboss

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mmumboss

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mmumboss

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edited Mar 6, 2014 at 10:43

mmumboss

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edited Mar 6, 2014 at 10:36

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MATLAB 54 47

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MATLAB 54 47