# am i doin right things

by flamex1992
Tags: doin, things
 P: 6 Question Write a program that utilizes looping to produce the following table of values: A --A+2 3 --5 6 --8 9 --11 12 --14 15 --17 and my input is with using the m-file for A=3:3:15 display ('A+2') A=A+2 end is it correct?
 P: 241 Your program gives only the values of A+2. Do you want table of values? And the line display('A+2') is not required. It simply displays 'A+2' and wont calculate anything. It will be better if you write like this for i=1:5 % you need five pairs in table x(i)=3*i; y(i)=x(i)+2; end display(x) display(y)
 P: 6 tis is the question my lacturer giv it to me.. i'm still not really understand wat the question wan.. can u tell the detail pls? i wuld aprreciate any helps Write a program that utilizes looping to produce the following table of values: A A+2 A+4 A+6 3 5 7 9 6 8 10 12 9 11 13 15 12 14 16 18 15 17 19 21
P: 241

## am i doin right things

Have you been asked to do it in Matlab?
You can use 'for loop' procedure in Matlab to accomplish this.
 P: 6 yup do it in matlab.. 'for loop' procedure is like how? the one tat i doin is called for loop?
 P: 241 Yes, the lines I mentioned at #2 gives output for A A+2 Within the same loop itself you can add codes for getting A+4 and A+6
 P: 6 thx.. u hav help me alot now.. then again, how to add eq A+4 and A+6 in the same M-file rather than makin 3 m-files for 3 equations... isit possible btw?
P: 241
 Quote by flamex1992 thx.. u hav help me alot now.. then again, how to add eq A+4 and A+6 in the same M-file rather than makin 3 m-files for 3 equations... isit possible btw?
Yes it is possible to do in single for loop.
Let me explain what is happening

for i=3:3:15

bla..
bla..

end

In the above for loop, the lines between 'for' and 'end' are executed 5 times for the values i=3,6,8,12,15.

if I include

disp(i)
disp(i+2)
disp(i+4)
disp(i+6)

between 'for' and 'end' it will display 3 5 7 9 in the first run
and 6 8 10 12 in the second run and so on.

Note in the line

for i=k:m:n

variable 'i' assumes value 'k' in first run value 'k+m' in second run and it continues till it equals value of n.
 PF Patron P: 1,132 I would save the values as rows in a matrix and use fprintf to display a table.
 P: 6 can help my friend give a clue on her question ? we both dont hav a clue on these question a) Write a program to convert centimeters to feet and inches. The input is number (floating, 2 decimal), in centimeters, the output should be the equivalent number of feet (integer) and inches (floating, 1 decimal), with the inches given to an accuracy of one decimal place. Assume: 1 inch = 2.54 cm 12 inches = 1 foot If the input value is 333.3, the output format should be: 333.3 centimeters is 10 feet 11.2 inches.
 PF Patron P: 1,132 You should be able to figure out the conversion logic, but for the display you can use something like: fprintf('%1.1f centimeters is %i feet %1.1f inches.\n', ans); (ans is a vector listing cm, ft, in) You'll want to read about the fprintf function and string formatting.
 P: 2 is the command right for the convert question? it seems i din understand about the end part like you stated 'fprintf' part.. clear all close all clc C = input('cm: '); X = (1/2.54)*C; inch=X foot=X*1/12
 PF Patron P: 1,132 I think it wants you to give the answer such that, if the answer is 130 in, it is displayed as 10 ft 10 in. You have the conversion factor, 1 in = 2.54 cm. You can use this to get the value in inches. You can use integer division (idivide in MATLAB) to get how many feet there are, and then find the remainder/modulus too get the number of inches. (Either rem or mod in MATLAB.) What you currently have won't accomplish that. I suggest you work on the basic logic first before worrying about formatting and displaying the answer.
 P: 2 Hmm... i guess i get the picture of it.... but is there any other way to display the answer other than the command that u gave above?
PF Patron
P: 1,132
I suppose you could use a series of disp commands (I don't remember whether disp has an automatic newline \n).

Edit: see the documentation for disp:
 Quote by MATLAB Documentation Example 3 — Display multiple items on the same line Use any of the following techniques to display multiple items on the same line: 1. Concatenate all substrings together using the [] operator. Convert any numeric values to characters using the num2str function:  name = 'Alice'; age = 12; str = [name, ' will be ', num2str(age), ' this year.'] Alice will be 12 this year.
fprintf and sprintf are pretty useful, though.
 P: 6 wow i hardly to understand that.. currently stuck like slayer did.. i'm unable to get the answer X cm equal X foot X inch ----------------------- 1 more thing how to the product of the odd interger for 1 to 15.. currently doing for a=1:2:15 display('odd integers'); display(a) ; end but it dont show the product off odd interger.. try put sum but still didnt giv an answer =( any idea?
 PF Patron P: 1,132 sum() won't give you a product! Try prod(a)

 Related Discussions General Discussion 47 Brain Teasers 16 General Discussion 10 General Discussion 14