Octave Tutorial #2 - Basic Operation

This is the second tutorial on Octave, looking at the basic operation of the interpreter. All Links and Slides will be in the description. Subscribe for more cool stuff!
Slides & files - www.mediafire.com/folder/eohq...
Octave Doc's - www.gnu.org/software/octave/d...
Octave - www.gnu.org/software/octave/
My Twitter: / drapstv
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[@user34274]

This is great! Thanks for putting in the effort to create these easy-to-understand tutorials. Highly appreciated !

[@hiteshpatel1094]

the best tutorial for octave so far

[@chimeforest]

A great intro! Something I found out, at 7:30, zero and ones also accept just 'n' and they will make a square matrix. So ones(3) will make a 3x3 matrix full of ones. Rand and randn will also accept just one input (to make a row) or none for a single output.

[@neswill1124]

grazie mille a te per questa serie di video! semplici , chiari e puliti. nonostante sono italiano e me la cavo discretamente con l'inglese riesco a captare tutto ciò che dici. Complimenti DAVVERO !!!

[@Muuip]

Great presentation ! Very helpful, thank you!

[@jassy4100]

Hi Very useful and correctly paced. I have a question once we use the same variable for 2 sets of matrices or vectors. How Octave will decide which variable to use in the next command involving them. Say S = [ 1:6] again S=[3:8] & T=[5:10] so S+T= will be calculated on which basis

[@mosesdanielshihepo63]

Highly appreciated 👌👌👌👌

[@allisonbenjamin6020]

Thanks for the tutorial! One question: Why do you put the dot before the +/-* element-by-element operations? What is the difference between normal operations and element-by-element operations?

[@mudassirbeautytips]

Same question (2)

[@chandanmaurya3015]

Really helpful tutorial

[@ChrisUbing]

In the slide describing the special matrices, please correct the caps on your commands. Octave only uses lower case here. Otherwise these tutorials are great!

[@sinaa7562]

Great Video!

[@dql375]

Muito bom , obrigado por sua ajuda.

[@hancock_str]

Me ajudou bastante!! Obrigada ♡💕

[@mukomalothbrok2641]

is Octave syntax exactly the same as MATLAB? what are the differences besides one coming with a GUI?

[@DrapsTV]

+Tinotenda Chemvura Octave was made with compatibility in mind. en.wikibooks.org/wiki/MATLAB_Programming/Differences_between_Octave_and_MATLAB

[@yellowboxster06]

Nice job.

[@reverendbluejeans1748]

Is there a way to save execute a file as a script like in python. One of the few languages that encourage command line code building.

[@enipirra8731]

How can I replace elements of a vector using function "any"? Thank u

[@lightningblade9347]

hi , I hope you are still alive lol , I'm asking you from the future : why did you add the dot in the matrices operations in the exemple m.\m etc ... instead of dividing , multiplying directly without adding the dots ?

[@rachmalind]

thanks so helpful

[@pushpajd2770]

sir how to write the last variable when we are adiing, if its an unrestricted search

[@marco.nascimento]

This is perfect, thanks!! I'm doing Andrew Ng's Machine Learning on Coursera, but the tutorials there doesn't have much quality, as the course is somewhat old.

[@ajahdheydydvseg]

Me too

[@mudassirbeautytips]

Me too

[@victoria-gf4of]

thank for the video .Can someone tell me why do you put a dot after the m . what for?

[@DrapsTV]

+victoria bellido The dot is to indicate that you wish to perform the operation on each element of the vector. :)

[@victoria-gf4of]

thank you ;now i understand

[@DrapsTV]

+victoria bellido Great ! :)

[@prajwalwaingankar3636]

1 big question.... is it better than python for ML....???? which should we use for ML ....??? 2. When i mistype any word the cmd prompt closes down....Is it normal or if i hv done some mistake while the download .....!!!! ******** THANKS IN ADVANCE *********

[@dhilkaran8503]

sir i need to write a programm for a boundary value problem

[@brandowsk]

Thank you

[@thatdudeoverthere7286]

thanks man

[@UniqueTech0098]

thank you for nice tutorial, I am not sure but i checked that S (1, [1,2] ) is different with S(1,1:2) & S(1,:)

[@opopopiddq]

Thanks a lot

[@subashghimire3450]

I want to solve the Eigen equation from octave. Equation is (V,L) = eig(M,N) where M,N are 4x4 matrices. can you please tell me how to solve the solution.

[@yashjain3407]

its easy

[@orlandosanchez6865]

Nice

[@thasneemmuthalib4003]

thanks a lot

[@DharmikBhatt]

What is the difference between rand and randn?

[@drallisimo34]

cool!!!

[@rakeshKumar-gm6ie]

I did not understand the rand and randn command function,..any way THANK YOU for making the detailed tutorial for beginners..:)

[@fudgesauce]

At around 8 minutes in, you list some built in functions. Unfortunately, they are all capitalized, which won't work! eg, "Ones(n,m)" instead of "ones(n,m)". Also, like "eye", ones, zeros, rand, randn optionally take a single argument and produce a square array, eg zeros(n) is the same as zeros(n,n). The same thing happens around 14:30 -- the functions are shown capitalized. Still, minor quibbles. Thanks for taking the time to create these videos.

[@DrapsTV]

+fudgesauce ah damn! Powerpoint obviously capitalized each line... I normally check that too! I'm glad you liked the videos :)

[@lmsk5178]

I noticed it too, but it's not a big deal. Great videos!

[@gototcm]

Is there a GUI version?

[@erwinfonseca9562]

very well

[@AnilKumar-ve2yl]

Hi sir ,your videos are great , please reply

[@LebenWerden]

You can solve ODE with Octave?

[@rosellenaidoo8361]

Hi, m. +m part I’m getting a syntax error, parse error. Any one able to assist ?

[@knuckle8582]

Construct a matrix of size 5x6 whose number field vary from 0 to 10

[@alhamdullilahforeverything859]

Please share the slides

[@divyrajzala867]

Siuuuuuuu

[@TheChodex]

what does m.^m do? I don't understand how it works

[@DrapsTV]

m is out matrix, ^ mean 'to the power of' and . means element by element. so raise each element of *m* to the power of itself in *m*.

[@TheChodex]

So if i got it right if matrix was A = [1 2; 3 4] then A^A would be [1^1 2^2; 3 ^3 4^4] = [1 4; 27 256]?

[@DrapsTV]

*A.^A* would indeed be [1, 4, 27, 256] _A^A_ would be a super complex matrix raised to a matrix. (math that I can't do without a computer or a fair few hours and a calculator.)

[@TheChodex]

Thanks for help :D

[@DrapsTV]

Of course! It would be pretty terrible of me to not help you when you are trying to learn!

[@antonistragoudaras1844]

ai gamisssssssssss

[@SofosDarkKnightGR]

Antonis Tragoudaras clear all

[@Amine-wp8bm]

No more python?

[@DrapsTV]

amine marzouki Dark Code I have an Argparse Tutorial coming out after the Octave Series, which is to replace the now depricated Optparse tutorial in the advanced Python series. What other tutorial would you like to see? I also have a MechanicalSoup and Scrappy Tutorials for the Hacking with Python series coming.

[@19stanislav03]

DrapsTV Email spider in python.

[@DrapsTV]

Stanislav Nikolov oooh fun :)

[@leelevi816]

Z=9 X=12 Y=20 sqrt(sqrt(Z^2+X^2)Y^2) ans my first

[@leelevi816]

+lee levi thank you

[@leelevi816]

+lee levi sqrt(sqrt(9^2+12^2)^2+20^2)

[@gissellevargas3551]

m.*m? Why do we put "." ?

[@DrapsTV]

the dot indicates to compute element by element arithmetic. so the first element of the left hand side will be multiplied against the first element of the right hand side. where as no "." will indicate normal matrix multiplication.

[@jonatansleiers9021]

FRIST

[@DrapsTV]

Well done! :)

[@berkaygurcan141]

Thanks a lot