displaying a description and variable value in the same line

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Tyler 2012-11-4

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评论： Steven Lord 2021-1-17

my knowledge isnt extensive in matlab, still a new user.

what i am trying to accomplish is displaying a variables value after a description.

what i want to display:

description : value

ex.

the highest point of the mountain is : 4563 ft

the variable hp = 4563 is already stored into the variables. (hp is the variable name for highest point)

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Image Analyst 2012-11-4

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编辑：Image Analyst 2012-11-4

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Try this:

fprintf('The highest point of the mountain is : %d feet.\n', hp);

Just like with the C language, if you're familiar with that. Or, if hp is a floating point number instead of an integer, use %f instead of %d:

fprintf('The highest point of the mountain is : %.2f feet.\n', hp);

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Image Analyst 2021-1-17

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Ben, that should work if you put enough significant digits:

x = -20;
y = exp(x)
fprintf('For x=-20 the true value of e^x is: %.22f\n', exp(x));

You'll see

y =

2.06115362243856e-09

For x=-20 the true value of e^x is: 0.0000000020611536224386

or try

fprintf('For x=-20 the true value of e^x is: %g\n', exp(x));

For x=-20 the true value of e^x is: 2.06115e-09

Steven Lord 2021-1-17

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That is the correct behavior. What is exp(-20)?

y = exp(-20)
y = 2.0612e-09

That's a pretty small number. How does that number display using the %f format inside fprintf? How would it display using a different format? Or what if you modify the format to show more decimal places?

x = -20;
fprintf('For x=-20 the true value of e^x is: %f\n', exp(x)); 
For x=-20 the true value of e^x is: 0.000000
fprintf('For x=-20 the true value of e^x is: %g\n', exp(x));
For x=-20 the true value of e^x is: 2.06115e-09
fprintf('For x=-20 the true value of e^x is: %.10f\n', exp(x));
For x=-20 the true value of e^x is: 0.0000000021