为什么数值在MATLAB中以科学计数法存储？

Question

I have tried to change the format to int but I will lose the accuracy. I do not want to display the value in scientific notation.

Any clue why does it save the values in scientific notation?

Answer 1

You can use the MATLAB function format to change how numbers are displayed by default format short , format long , etc.

If you want to display numbers with more control over the exact format, for example to control how many decimal points to display or to zero pad to keep field width/filename length a constant, use sprintf , optionally along with disp . For example:

sprintf('%0.5f',1/eps)          % 4503599627370496.00000
sprintf('%0.5g',1/eps)          % 4.5036e+15
sprintf('%05d.txt',1);          % 00001.txt
sprintf('%05d.txt',1000);       % 01000.txt

fprintf is like sprintf but for writing to file (the formatting commands are the same). You're not actually changing the number, just the display, so these functions are useful if you want a function or script to display some sort of output in a human-readable fashion, while retaining the more accurate values for calculation:

n = 5;
m = 50.53962983
disp(sprintf('Iteration %d: %2.2f',n, m)); % Iteration 5: 50.53
disp(m);  % 50.5396 - depends on your format setting
disp(sprintf('%0.8f',m)) % 50.53962983