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maxipat
Thursday, 15 October 2009 at 6:10am
Friday, 7 June 2019 at 7:07am
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page 1 of 4 recent posts

Thread: who's in science??

posted
08-Nov-10, 11:23
by maxipat
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posted about 9 years ago
I'm in applied electromagnetics (as much engineering as science)
Max

Thread: Pointless topic of the week - hair styling

posted
19-Oct-10, 08:23
edited about 22 seconds later
by maxipat
Avatar for maxipat
posted about 9 years ago
I must be showing my ag, I don't need anything in my hair or should that be head. One of the only advantages of thinning hair, it saves you money not needing to buy assorted "stuff" to go in your hair.
I can just about remember back to my youth (that was a long time ago), and once used old fashioned Brylcreme------ Horrible stuff.
God that has just made me feel really old.
Max

Thread: Question about getting two degrees

posted
27-Sep-10, 20:47
by maxipat
Avatar for maxipat
posted about 9 years ago
HI can anyone answer a question for me. My wife has just started back at University to take a further nursing degree. She currently has 2 degrees and a post graduate certificate. She has been told that she can not gain a degree qualification and she will end up with a graduate diploma. Can you not get two degrees in the same basic subject (same core modules but different optional specialty modules). Hopefully someone may be able to shed some light on this for us.
Thanks
Max

Thread: The nocturnal workers' thread

posted
14-Sep-10, 00:09
edited about 20 seconds later
by maxipat
Avatar for maxipat
posted about 9 years ago
Just emailed the progress report I have been trying to finish for the last 2 months to supervisor wooohooooo!!!!!!
Maybe I can get more than 4 hours sleep a night now.
Off to bed before I fall over been up since 5 this morning
Night everyone:-)

Thread: Stats Help

posted
03-Sep-10, 21:55
by maxipat
Avatar for maxipat
posted about 9 years ago
Hi Sneaks, I will try and explain what the data represents.
The two data sets are a measure of the voltage output of the same item measured using two different sets of test equipment. I am trying to get a way of describing how well the two measurement systems compare. In the ideal world the results should be exactly the same, but obviously the ideal world doesn't exist. So I am hoping to get a value that I can use to compare different sets of data without having to resort to the cumbersome descriptive method I am currently using.
The Z score I calculated was by the looks of it a mistake on my part, as I said I am a complete novice when it comes to stats so I am on a very steep learning curve
Max

Thread: Stats Help

posted
03-Sep-10, 21:19
by maxipat
Avatar for maxipat
posted about 9 years ago
Hi walminskipeasucker,thanks for the reply, I have attached a small portion of some of my data below. What I am trying to achieve is to come up with some measure of how well the two dtaa ranges compare , on a frequency by frequency basis. Does the Pearson correlation you mention compare the data in corresponding rows, for example compare the two data values for frequency 30.02, then the two for frequency 30.08 and so on. Does the r value then give a correlation result of all the rows.

Sorry if this is a bit unclear but I am not really sure how this works.

I have got some other data sets that I have more samples and have worked out a Z score to give an idea of the correlation, but I gather that I need more than two data sets to use this method.

If anyone can follow what I am trying to achieve and can offer some advice I would be really grateful.

Thanks in advance
Max




Frequency Data 1 Data 2
30.02 38.13 40.19
30.08 37.63 39.3
30.14 37.3 39.31
30.2 39.03 40.8
30.26 37.55 39.77
30.32 37.03 38.82
30.38 37.74 39.03
30.44 37.9 38.51
30.5 37.28 39.17
30.56 37.69 38.62
30.62 38.06 38.52
30.68 36.64 38.26
30.74 37.55 39.08
30.8 36.78 39.44
30.86 37.12 38.75
30.92 36.85 38.42
30.98 38.48 38.96
31.04 38.85 38.95
31.1 37.62 39.48
31.16 37.07 39.45
31.22 38.26 40.01
.
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.
.
.
.
.
.
200 67.11 68.21

Thread: Stats Help

posted
03-Sep-10, 12:04
edited about 28 seconds later
by maxipat
Avatar for maxipat
posted about 9 years ago
I am looking for a stats "guru" who can hopefully give me some advice. As a complete novice as far as stas is concerned I am not sure what the best approach to take to analyse my data.

I have a large number of X-Y graphs (amplitude vs Frequency) that i am looking to investigate the correlation between.
The data sets I am looking to compare are two sets of Y values (using the same Y range) (hope this makes sense). I have seen a similar study that used a Z score for the comparison but from what I have read this works best when comparing large data sets (>100 sets of data). As I have only two sets and am just looking at a point by point correlation between them can some one point me in the right direction please.

I have looked at using Graph pad and excel which both have a correlation function built in but not really knowing what the function is doing (the help file assumes you know which type of analysis you require) I am a bit unsure what the results mean.
Hopefully some one can shed some light on this for me.
Thanks in advance
Max

Thread: Bibliography Question

posted
22-Jul-10, 14:09
edited about 26 seconds later
by maxipat
Avatar for maxipat
posted about 9 years ago
I read on a web page yesterday that the bibliography should list everything you have read in the preparation of the paper/ thesis. I thought that it should list papers /documents /web pages that have actually been referenced in the paper you are writing. Can someone please clarify which is correct.
Thanks
Max

Thread: Another Latex question

posted
09-Jul-10, 21:15
by maxipat
Avatar for maxipat
posted about 9 years ago
Thanks for all the replies, I have managed to find out what the problem is, I have spaces in my file names and Latex doesn't seem to like them for some reason. I removed the spaces and everything seems ok.
Max
:-)

Thread: Another Latex question

posted
07-Jul-10, 21:18
by maxipat
Avatar for maxipat
posted about 9 years ago
I have looked on line and don't seem to be able to find the answer to this problem, I am insertying some figures into my report (.jpg format), I can display the images OK but cant seem to stop Latex printing the image file name above it, anybody got any idea how to stop it. I am using the following syntax :


\begin{figure}[h!]
\centering
\includegraphics[height=50mm, width=150mm]{1 GHz Comparison.jpg}
\caption{Vertical Height Scan Comparison-1000 MHz
\label{Height11}
\end{figure}

Thanks
Max

Thread: LaTeX questions from satchi really new-user

posted
28-Jun-10, 18:58
edited about 27 seconds later
by maxipat
Avatar for maxipat
posted about 9 years ago

Hi Satchi, to insert a simple table into your text you could use the example below, this will produce a two column table with a single column to start with for a title

\begin{table}[h]
\begin{tabular}{||p{5cm}||p{5cm}||}
\hline
\multicolumn{2}{|c|}{TITLE} \\hline
First Column Heading & Second Column Heading \\hline
Ist Column Data #1 & Second Column #1 \\hline
Ist Column Data #2 & Second Column #2 \\hline
\end{tabular}
\caption{Title for Under table}
\label{tab:Name to be able to reference table further on in text}
\end{table}

Hope this helps fro adding a simple table, if you need more info give a shout back and I will try and help, I think this is the sort of thing you were looking at.
Max

Thread: Graphpad Prism Help

posted
01-Jun-10, 19:20
by maxipat
Avatar for maxipat
posted about 9 years ago
Hi Al, thanks for the reply. I have spoken to our "guru" at work today and it seems that I was trying to over complictae things. All I need to do is set up two seperate tables with their own data in then in one of the graphs add another series (data from the other sheet) graphpad will then do all the work and plot the new data against the old X values.
Thanks
for trying to help
Max

Thread: Graphpad Prism Help

posted
30-May-10, 10:17
edited about 16 seconds later
by maxipat
Avatar for maxipat
posted about 9 years ago
Hi Al, thanks for the reply, I will try and explain my problem a bit better.
I have recorded some data that is amplitude against frequency (from 30 to 200 MHz), I want to plot frequency on the x axis and amplitude on the Y axis. The first set of data has frequency recorded with a step size of 60Hz, the second set of data has the frequency increment of 50 Hz, so when I rty to plot the two sets of data on the same graph, 1) I have more data cells on the 50 Hz version and obviously they then dont match if I try and just plot them directly.

data set 1

Frequency Amplitude
30.000 10.8
30.060 11.7
30.120 10.9

data set 2
Frequency Amplitude
30.000 10.4
30.050 11.9
30.100 10.2



What I was hoping to be able to do to merge the data so I can plot it on one graph.

Hope this is a bit clearer, and hopfully youcan give a idea how to do it .

Thanks

Max

Thread: Graphpad Prism Help

posted
28-May-10, 21:57
by maxipat
Avatar for maxipat
posted about 9 years ago
I was hoping someone can give me some help with a problem I have with some data I am trying to analyse with Graph pad Prism.
I have 2 data sets, one set has an increment between subesequent x values of 0.06, the second set has an increment of 0.05. If I wanted to plot these two data sets on the same graph (using the above values as the X value) is there a way of getting Graph Pad to interpolate the results. They both have the same range (30-200), but obviously 1 of them has fewer actual data values.
I am hoping this is possibel and some one can tell me how to sort it out
Thanks
Max

Thread: Writing in the early days

posted
28-May-10, 08:34
by maxipat
Avatar for maxipat
posted about 9 years ago
I started last October and am getting into things now,I read here and elswhere that people recommend writing from early as possible. My question is what approach others have used for this, currently I try tyo write as often as possible, ususlly this has involved breaking the background material for my subject down into small sub headings and writing notes (with references included where applicable) on each of these topics. Would I be better working through the great pile of papers I have and writing individually on each paper or is the method I am currently using one that others have used with success?
Any thoughts would be gratefully received :-)
Thanks
Max
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