I want Estimate log to the base 10 value using 'x' number such that 10^estimated value is equal to or just exceeding x.

Question

Manav Divekar 2021-11-4

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1579025-i-want-estimate-log-to-the-base-10-value-using-x-number-such-that-10-estimated-value-is-equal-to-o

评论： Manav Divekar 2021-11-4

function [out] = log10_bywhile(x, inc)
esmt = 0;
if ~exist('inc','var')
	inc = 0.01;
end
inc1 = 0;
while esmt <=x
	esmt = 10^inc1;
	inc1 = inc1+inc;
end
out = inc1-inc;

This is the i wrote to calculate the estimated value for log10 but, for log10 of 100 I should be getting 2 as output as it is a perfect value.

>> log10_bywhile( 50, 0.1 ) % Correct output
ans =
    1.7000
>> log10_bywhile( 100, 1 ) % Wrong Output
ans =
     3

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Answer 1

Alan Stevens 2021-11-4

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1579025-i-want-estimate-log-to-the-base-10-value-using-x-number-such-that-10-estimated-value-is-equal-to-o#answer_823788

在 MATLAB Online 中打开

< not <=

a = log10_bywhile( 50, 0.1 )
a = 1.7000
b = log10_bywhile( 100, 1 )
b = 2
function [out] = log10_bywhile(x, inc)
esmt = 0;
% if ~exist('inc','var')
% 	inc = 0.01;
% end
inc1 = inc;
while esmt < x      %%%%%%%%%%%%%%%%%%  
	esmt = 10^inc1;
	inc1 = inc1+inc;  
end
out = inc1-inc;
end