Problem in matlab IEE float
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From: Kaze on 24 Jan 2010 14:20 > Hmmmm ... well, now isn't that curious? You got the same answer for the number of elements of F in the interval [1,2) as in the interval [1/64,1/32). Does that seem right to you? Is that what you expect, or would you expect to get a different answer for these two questions? > > James Tursa What I aspect is to understand what I'm doing and to have no errors. Of course the problem has to be solved corecly. I get the same answer but I don't think is wrong. Thank you again for the help, I learn more from you than from my teacher. Kind regards.
From: Steven Lord on 24 Jan 2010 23:01 "Kaze " <raicabogdan(a)gmail.com> wrote in message news:hj7m8j$23m$1(a)fred.mathworks.com... > Hello, > I need to solve a problem in matlab. Here is what I must do: > > Let F, set of all numbers in IEEE floating point, except NaN and inf, > whith 7ff (in hexadecimal) exponent moved and numbers not normalized > with superscript moved 000 (in hexadecimal) > > I realy don't know how should I start. > > After this I have to answer: > > 1. How many elements F has > 2. What proportion of elements of F are in the interval [1, 2)? > 3. What proportion of elements of F are in the interval [1/64, 1/32) ? > 4. I need to determine by random selection the proportion of elements of F > which satisfy the logical relationship: x*(1/x) == 1 The first three questions you can do without using MATLAB. Take a look at this Cleve's Corner article for more information about IEEE floating point numbers: http://www.mathworks.com/company/newsletters/news_notes/pdf/Fall96Cleve.pdf For question 4, two of the functions in the Data Type Conversion list of functions will help you in the random selection. http://www.mathworks.com/access/helpdesk/help/techdoc/ref/f16-6011seg05.html#f16-52710 -- Steve Lord slord(a)mathworks.com comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ
From: Kaze on 25 Jan 2010 01:20 "Steven Lord" <slord(a)mathworks.com> wrote in message <hjj53e$qaj$1(a)fred.mathworks.com>... > > "Kaze " <raicabogdan(a)gmail.com> wrote in message > news:hj7m8j$23m$1(a)fred.mathworks.com... > > Hello, > > I need to solve a problem in matlab. Here is what I must do: > > > > Let F, set of all numbers in IEEE floating point, except NaN and inf, > > whith 7ff (in hexadecimal) exponent moved and numbers not normalized > > with superscript moved 000 (in hexadecimal) > > > > I realy don't know how should I start. > > > > After this I have to answer: > > > > 1. How many elements F has > > 2. What proportion of elements of F are in the interval [1, 2)? > > 3. What proportion of elements of F are in the interval [1/64, 1/32) ? > > 4. I need to determine by random selection the proportion of elements of F > > which satisfy the logical relationship: x*(1/x) == 1 > > The first three questions you can do without using MATLAB. Take a look at > this Cleve's Corner article for more information about IEEE floating point > numbers: > > http://www.mathworks.com/company/newsletters/news_notes/pdf/Fall96Cleve.pdf > > For question 4, two of the functions in the Data Type Conversion list of > functions will help you in the random selection. > > http://www.mathworks.com/access/helpdesk/help/techdoc/ref/f16-6011seg05.html#f16-52710 > > -- > Steve Lord > slord(a)mathworks.com > comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ > Thank you, but this was needed to be solved in matlab. I'm going to look in the second link you provided, but as I said, I'm a beginner so ... I don't realy know what to chose from there. Kind regards
From: James Tursa on 25 Jan 2010 01:54 "Kaze " <raicabogdan(a)gmail.com> wrote in message <hji6h5$as3$1(a)fred.mathworks.com>... > > Hmmmm ... well, now isn't that curious? You got the same answer for the number of elements of F in the interval [1,2) as in the interval [1/64,1/32). Does that seem right to you? Is that what you expect, or would you expect to get a different answer for these two questions? > > > > James Tursa > > What I aspect is to understand what I'm doing and to have no errors. Of course the problem has to be solved corecly. > > I get the same answer but I don't think is wrong. Well, if you really think those results are correct then turn them in. Good luck. James Tursa
From: Kaze on 25 Jan 2010 03:02
"James Tursa" <aclassyguy_with_a_k_not_a_c(a)hotmail.com> wrote in message <hjjf6e$8iu$1(a)fred.mathworks.com>... > "Kaze " <raicabogdan(a)gmail.com> wrote in message <hji6h5$as3$1(a)fred.mathworks.com>... > > > Hmmmm ... well, now isn't that curious? You got the same answer for the number of elements of F in the interval [1,2) as in the interval [1/64,1/32). Does that seem right to you? Is that what you expect, or would you expect to get a different answer for these two questions? > > > > > > James Tursa > > > > What I aspect is to understand what I'm doing and to have no errors. Of course the problem has to be solved corecly. > > > > I get the same answer but I don't think is wrong. > > Well, if you really think those results are correct then turn them in. Good luck. > > James Tursa Thank you. Regards. |