i have a problem rounding a loop

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Raul Castillo
Raul Castillo 2019-11-6
评论： Steven Lord 2019-11-7
so if i write a loop that and it gives me a answer of .0215243225 you know just a huge number but i wanted to round it to the .0001, .001, .01. how would i do that i m using a for statment for a loop
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Shubham Gupta
Shubham Gupta 2019-11-7
编辑：Shubham Gupta 2019-11-7
Do you want to round the value to significant digits, which will change in a loop? For e.g.
a_answer= .0215243225;
for i = 2:5
output = round(a_answer,i)
end
% You will get output
output =
0.02
output =
0.022
output =
0.0215
output =
0.02152
It's basically the same method as mentioned by John, only instead of looping on values I looped it for significant digits.
Steven Lord
Steven Lord 2019-11-7
Shubham Gupta,
You can do that without manually adjusting the number of digits by specifying the 'significant' option in your call to round.
>> a_answer= .0215243225;
>> round(a_answer, 3, 'significant')
ans =
0.0215
>> b = pi/1000;
>> round(b, 3, 'significant')
ans =
0.00314
>> round(b, 5)
ans =
0.00314

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