格式化图例以在Matlab中包含指数

Question

very simple question here that I can't find an answer to.. I know how to adjust the values in the axes but for the legend, I want to include the value of a certain number that's on the order of 1e6. At the moment, the legend is printing out all digits instead of the exponent. How do I force it to print the exponential format? So far, I have:

str1 = sprintf('Re = %2.2f', Re);
str2 = sprintf('D = %2.1f m', D);
legend(str1,str2,'Location','southeast');

And Re is a value being calculated higher up in the code and it is the one I want to force to print exponentially.

Any help would be really appreciated! Thanks in advance

Answer 1

Use e fromat specifier instead:

str1 = sprintf('Re = %2.2e', Re);

You can also use g which will automatically choose between f and e based on the size of resulting string.