Array using for loop: using sprintf

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Ullas Rajvanshi 2016-9-12

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评论： Stephen23 2016-9-12

Make the following two vectors, each with the same number of elements (77). v1: a 1D-array with random numbers (floats) between 0 and 8515.0 . v2: the nearest integer value corresponding to every element of v1. now use the sprintf() command to print a table with 77 rows and 3 columns. The first column contains v2 (displayed as integers, so 41 instead of 41.000). The second column contains v1, displayed as floats with 2 decimals. The third column contains v1 displayed in scientific notation, with 3 decimals. I know we have to make use of for loop in this, but how?

Thanks in advance

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Stephen23 2016-9-12

@Ullas Rajvanshi: what have you tried so far?

If we do you work for you, how do you expect to learn anything from that course?

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Answer 1

Stephen23 2016-9-12

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编辑：Stephen23 2016-9-12

在 MATLAB Online 中打开

You could use a loop like this:

define the two vectors, say X and Y.
loop over them, using for k = 1:numel(X).
use indexing each loop to access the vector elements
call sprintf with those values.

But actually you don't need to use a loop at all. Have a look at this:

>> M = 9*rand(1,5);
>> fprintf('%4.0f,%7.2f,%12.3e\n',[M;M;M])
   7,   6.82,   6.820e+00
   7,   6.69,   6.688e+00
   4,   3.53,   3.530e+00
   6,   5.90,   5.899e+00
   2,   1.54,   1.541e+00

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Ullas Rajvanshi 2016-9-12

Thanks for the motivation. I would like to apologise for that. I am able to solve it now. Thanks for your help! :)

Stephen23 2016-9-12

@Ullas Rajvanshi: I am glad that you got motivated. I really do wish you lots of luck and fun learning MATLAB! And please come and ask questions when something does not work for you.

https://www.mathworks.com/matlabcentral/answers/228557-experts-of-matlab-how-did-you-learn-any-advice-for-beginner-intermediate-users

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