anyone noes how to use matlab?

i am asked to write a program but hor....i dunnoe! arrrr......

anyone can help?

what you want to do?

use their help. the matlab help is pretty extensive and quite comprehensive

Originally posted by hisoka:

what you want to do?

use their help. the matlab help is pretty extensive and quite comprehensive

where to find matlab help?

i hav been surfing the net but den, nt much progress...

Originally posted by hiphop2009:

where to find matlab help?

i hav been surfing the net but den, nt much progress...

press f1? or read the help file

Originally posted by hisoka:

press f1? or read the help file

my matlab version is campus version, so means i can only use it in sch....at home cannot use....arrr....

Originally posted by hiphop2009:

my matlab version is campus version, so means i can only use it in sch....at home cannot use....arrr....

oops

nah online de

http://www.mathworks.com/access/helpdesk/help/techdoc/matlab.html

thanx matlab difficult la....lol.

what u want to do with matlab…. haven’t say leh…

Originally posted by eagle:

what u want to do with matlab.... haven't say leh...

i dunnoe i can post my question here or nt (suppose to be a mini project) but, here is the description:

using the LMS (least mean square) algorithm, remove a 50HZ noise from the ECG signal (the ECG signal has 50 HZ noise, so u are suppose to remove it using the LMS algorithm)

Wow....good luck with Matlab....really MAD

Originally posted by hiphop2009:

i dunnoe i can post my question here or nt (suppose to be a mini project) but, here is the description:

using the LMS (least mean square) algorithm, remove a 50HZ noise from the ECG signal (the ECG signal has 50 HZ noise, so u are suppose to remove it using the LMS algorithm)

Dun understand electronics....

But...what is the LMS algorithm? Provided??

Originally posted by deathscythe99:

Dun understand electronics....

But...what is the LMS algorithm? Provided??

no la. we are suppose to find out wad it is!

too chim for poly student like me.

Originally posted by hiphop2009:

i dunnoe i can post my question here or nt (suppose to be a mini project) but, here is the description:

using the LMS (least mean square) algorithm, remove a 50HZ noise from the ECG signal (the ECG signal has 50 HZ noise, so u are suppose to remove it using the LMS algorithm)

haha... sounds similar to a lab that I need to do soon for a particular module on digital signal processing... but I haven't go and find out how to do yet...

just FYI, the 50Hz noise is due to the power lines from the power source, which is at 50Hz....

Are you supposed to write something to plot a transfer function of a notch filter at 50Hz?

Originally posted by eagle:

haha... sounds similar to a lab that I need to do soon for a particular module on digital signal processing... but I haven't go and find out how to do yet...

just FYI, the 50Hz noise is due to the power lines from the power source, which is at 50Hz....

Are you supposed to write something to plot a transfer function of a notch filter at 50Hz?

nt exactly, btw, i PM-ed you. go check it.

Originally posted by hiphop2009:

nt exactly, btw, i PM-ed you. go check it.

think I can't help much
Still not exactly sure....

The LMS algorithm for a pth order algorithm can be summarized as
Parameters:
p = filter order
u = step size

Initialisation:

Computation: For n = 0,1,2,...




Maybe initialise the details, and code out a loop in matlab?

Reference:
http://en.wikipedia.org/wiki/Least_mean_squares_filter
http://www.es.lth.se/ugradcourses/asb/CE/CE2e.pdf

Originally posted by eagle:

think I can't help much
Still not exactly sure....

The LMS algorithm for a pth order algorithm can be summarized as
Parameters:
p = filter order
u = step size

Initialisation:

Computation: For n = 0,1,2,...




Maybe initialise the details, and code out a loop in matlab?

Reference:
http://en.wikipedia.org/wiki/Least_mean_squares_filter
http://www.es.lth.se/ugradcourses/asb/CE/CE2e.pdf

hmmm....ok thanks a million! i discuss it further with my frenz in my grp.

Originally posted by hiphop2009:

hmmm....ok thanks a million! i discuss it further with my frenz in my grp.

might need to request codes from u

I pm u if I need when I confirm what my lab is...

Originally posted by eagle:

might need to request codes from u

I pm u if I need when I confirm what my lab is...

LOL. dun ask me....coz i very beginner nia...

Originally posted by hiphop2009:

i dunnoe i can post my question here or nt (suppose to be a mini project) but, here is the description:

using the LMS (least mean square) algorithm, remove a 50HZ noise from the ECG signal (the ECG signal has 50 HZ noise, so u are suppose to remove it using the LMS algorithm)

why not just do a fourier transformt hen remove the 50 Hz component?

Originally posted by hiphop2009:

i dunnoe i can post my question here or nt (suppose to be a mini project) but, here is the description:

using the LMS (least mean square) algorithm, remove a 50HZ noise from the ECG signal (the ECG signal has 50 HZ noise, so u are suppose to remove it using the LMS algorithm)

Aka using a bloody filter lah!!!
Which version of the campus program of matlab u using?

Do a loop, since u have the main equation it makes it easier…

Originally posted by eagle:

think I can't help much
Still not exactly sure....

The LMS algorithm for a pth order algorithm can be summarized as
Parameters:
p = filter order
u = step size

Initialisation:

Computation: For n = 0,1,2,...




Maybe initialise the details, and code out a loop in matlab?

Reference:
http://en.wikipedia.org/wiki/Least_mean_squares_filter
http://www.es.lth.se/ugradcourses/asb/CE/CE2e.pdf

How about you ask him to use the different windows in the Matlab program?

Originally posted by hisoka:

why not just do a fourier transformt hen remove the 50 Hz component?

cannot, our project is to use LMS algortihm....

just to  borrow this topic...
I have an osscilation waveform,P and i wanna find the magnitude rougly 5 secs after it starts oscillating.
I know a function called, max(), so,  can i use max() - min () to get the magnitude?
Because, if i put max(P) - min (P), it will gimme the magnitude starting from time 0s, which i dun wan ...

Or is there another way to find the magnitude after some T time of a waveform ?

Any help ?

i feel sometimes u can try google it.. search "matlab + wadever u wan to find".. can sometimes work wonders..