ENG1060 Computing

[sajib_mostofa]

Now I have the problem where it only verifies the first statement and not the others when I type my inputs in

[JinXi]

The restriction they put on Q1 was so stupid. Creating a Vector with 0 and 1's for the conditions would only need 3 lines of code whereas the "official" way take soo much longer... but yeah i did exactly what xzero did.

Now I have the problem where it only verifies the first statement and not the others when I type my inputs in

Make sure you typed end at the 'end' of each segment of your condition.
if
else
end

* meaning you'll have 5 separate sections, one for each condition.

[sajib_mostofa]

This is what I typed yet still getting one output:

% Condition 1 - Numbers are equal to each other
if round(n1) == round(n2)
    are_equal = 1;
else are_equal = 0;
end

% Conditin 2 - Numbers are odd
if mod(round(n1),2) ~= 0 && mod(round(n2),2) ~= 0
    are_odd = 1;
else are_odd = 0;
end

% Condition 3 - Numbers are negative
if n1 < 0 || n2<0
    is_neg = 1;
else is_neg = 0;
end

% Condition 4 - Numbers are within 0.2 of 1
if (n1>=0. && (n1<=1.2) || (n2>=0. && (n2<=1.2)
    is_near = 1;
else is_near = 0;
end

% Condition 5 - None of the above
if are_equal == 0 && are_odd == 0 && is_neg == 0 && is_near == 0
    none = 1;
else none = 0;
end

[xZero]

For the output in your mfile you should have a vector with 5 columns

eg. [are_equal, are_odd, is_neg, is_near1, none] = MyCompare(n1,n2)

[sajib_mostofa]

So what i typed in my function file was incorrect?

[JinXi]

So what i typed in my function file was incorrect?

It looks fine. Maybe just use debug and go through it slowly?

[xZero]

Your function file is fine. It's the mfile that needs some debugging

[sajib_mostofa]

Woo thanks guys it works. Pity its only worth 1 mark given the amount of time I spent on it.

[JinXi]

wtff i've been falling asleep in all 3 lectures since the start of Numerical Methods... I've noticed many people around me dozing off too.. I don't find the context  or Wai Ho boring and I get enough sleep(well sort of).

Is there something wrong with the ventilation system/ heating 

I'll try to not fall asleep tommorrow but that was what I said this morning and i dozed off for a good 30 mins, directly infront of Wai Ho .... :buck2:

[taiga]

I have slept through for two weeks, just been going through the notes and the recommended textbook

[sajib_mostofa]

Can anyone give me a headstart on the second task? Have no idea how to approach it

[m@tty]

Ah, yeah, it is quite confusing at first.

What you need to do is remember that matrix multiplication is done across the rows of the first matrix and down the columns of the second.

So you need to multiply the corresponding elements of the rows/columns - that will be the innermost loop

And for each time you do this you need to isolate a specific row in the first/column in the second.

I don't know how helpful this will be.. =\ The code is really short (three nested for loops) but quite hard to explain in words..

I have slept through for two weeks, just been going through the notes and the recommended textbook

Did you buy the book? Oh and I do the same because I miss many lectures due to laziness

[darkphoenix]

wtff i've been falling asleep in all 3 lectures since the start of Numerical Methods... I've noticed many people around me dozing off too.. I don't find the context  or Wai Ho boring and I get enough sleep(well sort of).

Is there something wrong with the ventilation system/ heating 

I'll try to not fall asleep tommorrow but that was what I said this morning and i dozed off for a good 30 mins, directly infront of Wai Ho .... :buck2:

I have slept through for two weeks, just been going through the notes and the recommended textbook

This is why i stopped going LOL

[taiga]

nah didn't buy it. I'll go through everythign again properly in the midsem break. Two lecture a day from week 4 or 5

[moekamo]

has anyone had their lab yet that i can compare my answers with, im usually on friday but its a holiday and i just want to check to make sure i didnt do anything stupid...like i do in the normal lab but with people there...

anyway i know question 1 and 2 are right.

3. i got the answer by getting the double derivative, doing the newton method and my answer was: -5.922732491389207

4.a. With lower and upper limits of 100 and 200 i got the mass as 142.8196142367188 after 5 iterations.
Also, my lower limit never changed, did that happen to you guys too?

4.b. with initial guess of 100 and pert=0.01 i got mass=  142.7408 to 4 D.P

5.
Bisection Method Root is 144.83459 (13 steps - seems like a lot?!)
False Position Method Root is 144.83560 (8 steps)
Modified Secant Method Root is 144.83462 (4 steps)
Modified Secant Method is Most Efficient with 4 steps

Also, on my graph, the bisection method percentage error goes higher, then lower and higher again then lower, this sort of makes sense, but did it happen to anyone else?