how to obtain maximum numbers after decimal point?

hi

in calculation, my problem needs at least 20 to 30 digits after decimal point for e.g (1.234567898745612321654645454875) for perfect answer. but in matlab using "format long" i just get 15 digits after decimal. is there any way to get values upto 20 to 30 digits after decimal point. kindly help me i will be highly thankful to you

With best Regards Mudasir

Answer 1

[Walter Roberson]

No there is not. You will need to use the symbolic toolbox or one of John D'errico Variable Precision toolbox contributions to the File Exchange.

[Mudasir Ahmed]

Thanks dear sir. i load following toolboxes but unfortunately both are not working http://www.mathworks.com/matlabcentral/fileexchange/22725-variable-precision-integer-arithmetic

http://www.mathworks.com/matlabcentral/fileexchange/22725-variable-precision-integer-arithmetic/content/VariablePrecisionIntegers/@vpi/vpi.m

[Mudasir Ahmed]

Sir, vpi command is not working in matlab and produce error.

[Walter Roberson]

What happens when you try it? Did you unzip the toolbox into an empty directory and use pathtool to add the directory to your MATLAB path?

[Mudasir Ahmed]

Dear Sir,

I unzip the folder and give path by SET PATH option but it still give error like Undefined function 'vpi' for input arguments of type 'double'.

sir my program require at least 20 to 30 digits after decimal without this precision i cannot do any thing useful with my code.

[Mudasir Ahmed]

dear sir, my another query regarding is in following link regarding vpa and sym commands

http://www.mathworks.com/matlabcentral/answers/260715-how-to-get-precision-value-upto-20-to-30-digits-after-decimal