Approximate the variable in the workspace to one digite ?
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Hi all
I am have 1000 variables in the workspace, each one have five digits after the comma like 50,44444
How aproximated all 1000 variables to one digit after the comma like 50,4 ? because I cant chang each one individually ? so difficult!
采纳的回答
David Young
2014-11-19
编辑：David Young
2014-11-19
If you mean you have 1000 values stored in an array, and you want to change the stored values to be rounded to one decimal place, then you can do this:
Xround = round(X*10)/10;
[Edit: please note that if you have R2014b or later, there is a neater solution
Xround = round(X, 1);
as pointed out by ImageAnalyst.]
If you mean you want to print the values showing only one decimal place, then you can do this:
fprintf('%8.1f\n', X);
varying the format string as necessary to get the output you want.
If you mean you have 1000 different variables, perhaps with names like x0001, x0002 etc., then you should change the structure of your program, and store the values in an array.
更多回答（2 个）
Star Strider
2014-11-19
1 个投票
See the documentation for format. You can set the numeric display to one of several options. (The data themselves are all stored to the same precision, so the display precision does not affect the data precision.)
Image Analyst
2014-11-19
Use the round function:
m=rand(4) % Tons of digits.
m1 = round(m, 1) % Round to first digit.
Hopefully your thousands of variables are in an array and not truly thousands of separate variables, which would be bad programming practice.
1 个评论
David Young
2014-11-19
Well I learnt something from that! I hadn't noticed the new optional arguments for round()!
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