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• MATLAB: Reading floating point numbers and strings from a file

  - by xsound

  I am using the following functions for writing and reading 4098 floating point numbers in MATLAB: Writing: fid = fopen(completepath, 'w'); fprintf(fid, '%1.30f\r\n', y) Reading: data = textread(completepath, '%f', 4098); where y contains 4098 numbers. I now want to write and read 3 strings at the end of this data. How do I read two different datatypes? Please help me. Thanks in advance.

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• Exact textual representation of an IEEE "double"

  - by CyberShadow

  I need to represent an IEEE 754-1985 double (64-bit) floating point number in a human-readable textual form, with the condition that the textual form can be parsed back into exactly the same (bit-wise) number. Is this possible/practical to do without just printing the raw bytes? If yes, code to do this would be much appreciated.

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• Best point to overwrite the navigationBar property of navigationController

  - by flohei

  Hi there, I'm overwriting UINavigationController to replace the default navigationBar property with an instance of my own subclass of UINavigationBar. So I tried something like _navigationBar = [[SBNavigationBar alloc] init]; in my -initWithRootViewController:. But that didn't work out as I expected it. There's still the default navigationBar being displayed. So what's the best point to overwrite the navigationBar? Thanks in advance –f

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• Function Point Analysis -- a seriously overestimating technique?

  - by kizzx2

  I know questions about FPA has been asked numerous times before, but this time I'm taking a more analytical angle at it, backed up with data. 1. First, some data This question is based on a tutorial. He had a "Sample Count" section where he demonstrated it step by step. You can see some screenshots of his sample application here. In the end, he calculated the unadjusted FP to be 99. There is another article on InformIT with industry data on typical hour/FP. It ranges from 2 hours/FP to 27.4 hours/FP. Let's try to stick with 2 for the moment (since SO readers are probably the more efficient crowd :p). 2. Reality check!? Now just check out the screenshots again. Do a little math here 99 * 2 = 198 hours 198 hours / 40 hours per week = 5 weeks Seriously? That sample application is going to take 5 weeks to implement? Is it just my feeling that it wouldn't take any decent programmer longer than one week (I"m not even saying weekend) to have it completed? Now let's try estimating the cost of the project. We'll use New York's minimum wage at the moment (Wikipedia), which is $7.25 198 * 7.25 = $1435.5 From what I could see from the screenshots, this application is a small excel-improvement app. I could have bought MS Office Pro for 200 bucks which gives me greater interoperability (.xls files) and flexibility (spreadsheets). (For the record, that same Web site has another article discussing productivity. It seems like they typically use 4.2 hours/FP, which gives us even more shocking stats: 99 * 4.2 = 415 hours = 10 weeks = almost 3 whopping months! 415 hours * $7.25 = $3000 zomg (That's even assuming that all our poor coders get the minimum wage!) 3. Am I missing something here? Right now, I could come up with several possible explanation: FPA is really only suited for bigger projects (1000+ FPs) so it becomes extremely inaccurate at smaller scale. The hours/FP metric fluctuates abruptly from team to team, project to project. For a small project like this, we could have used something like 0.5 hour/FP or something. (Now this kind of makes the whole estimation thing pointless, unless my firm does the same type of projects for several years with the same team, not really common.) From my experience with several software metrics, Function Point is really not a lightweight metric. If the hour/FP thing fluctuates so much, then what's the point, maybe I could have gone with User Story Points which is a lot faster to get and arguably almost as uncertain. What would be the FP experts' answers to this?

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• Need "starting point" hints about adding "tabbed" interface to Django admin

  - by Edwin

  Hi, I'm new to the web development world - that means I'm new to javaScript/CSS. Now I'm building a web system with Python Django. I'm wondering would you like to give me some hints as the starting point for adding "tabbed" interface to Django admin? For example, there are 3 detail table for a master table, and I want to use 3 different tabs for editing that 3 detail tables in the 'edit' page for the master table. Thank you in advance!

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• MKMapView: getting latiude and longitude for a point

  - by VansFannel

  Hello. I'm developing an iPhone application and I want to know the location on a MkMapView where the user has touch. I have a MKMapView that fills the screen. When the user touch over the map, I need to know the location of the point the user has touched. Is that possible? Thank you.

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• Dynamically change 3D Center point in FlashCS4

  - by eco_bach

  Hi Using the new 3D features in CS4. I know you can change the 3d center point manually via the Transform panel, but does anyone know how to do this dynamically at runtime? (ie via code)

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• Managed DirectX as a starting point

  - by numerical25

  I know the difference between manage and unmanaged DirectX. My question is if I decided to do managed directX as a starting point, would it help me to better understand unmanaged DirectX. Honestly, the only thing I see different about the 2 is how you initiate and access resources. Matrix Math is Matrix no matter what so If I learn it in managed, then I should be fine in unmanaged

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• iphone: floats cast to unsigned ints get set to 0 if they are negative!?

  - by matt

  try it out: volatile float bob = -344.0f; unsigned int fred = (unsigned int)bob; printf("%d\n",fred); output will be 0. obviously I am expecting it to wrap around just as if I had cast from a signed int to an unsgined int (which does wrap and act as expected on the iphone) we assume it is something to do with the floating point settings. any ideas?

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• cpu floating operations cost

  - by wiso

  I'm interesting in the time cost on a modern desktop cpu of some floating point operations in order to optimize a mathematical evaluation. In particular I'm interested on the comparison between complex operations like exp, log and simple operation like +, *, /. I tried to search for these information, but I can't find a source.

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• What is the point of padding?

  - by ktm5124

  In particular, I'm reading into the Mach-O binary file format for Intel 32 on OS X. After the FAT header there is a whole bunch of padding before the offset of the first archive. What is the point of all this padding? To be more specific, there is upwards of 4000 bytes of padding between the FAT header and the first archive (in particular, the mach_header). Why include all these extra bytes?! Is OS X fond of adding 4 MB to all their universal binaries?

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• Manage DirectX as a starting point

  - by numerical25

  I know the difference between manage and unmanaged DirectX. My question is if I decided to do managed directX as a starting point, would it help me to better understand unmanaged DirectX. Honestly, the only thing I see different about the 2 is how you initiate and access resources. Matrix Math is Matrix no matter what so If I learn it in managed, then I should be fine in unmanaged

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• Fixing Floating Point Error

  - by HannesNZ

  I have some code that gets the leading value (non-zero) of a Double using normal math instead of String Math... For Example: 0.020 would return 2 3.12 would return 3 1000 should return 1 The code I have at the moment is: LeadingValue := Trunc(ResultValue * Power(10, -(Floor(Log10(ResultValue))))) However when ResultValue is 1000 then LeadingValue ends up as 0. What can I do to fix this problem I'm assuming is being caused by floating point errors? Thanks.

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• What is the point of a constant in C#

  - by Adam

  Can anyone tell what is the point of a constant in C#? For example, what is the advantage of doing cosnt int months = 12; as opposed to int months = 12; I get that constants can't be changed, but then why not just... not change it's value after you initialize it?

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• Compare floating point numbers in Latex

  - by Abhi

  I am trying to use \ifthenelse to do a floating point comparison. This is the pgf/tikz code, which works if \y is integer only, but not otherwise: \foreach \y in {3,3.5,...,6} { ifthenelse{\y<3}{ ... }{ ... } }

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• Is there a float equivalent to the standard stdint.h in C/C++?

  - by anachoret

  I am looking for C/C++ language standard headers that define fixed precision floating point types. Do they exist?

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• Floating point numbers in XML

  - by Jamie

  what is the best way to handle floating point numbers in XML? If I have, for instance: double a = 123.456; and I would like to keep it as <A> 123.456 </A> simply using ... myDoc.createTextNode(a.ToString()); is fine? Or should it be done with some Globalization stuff to make it region-independent?

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• How can i allow the user to point their custom domains to point to sub domains in my asp.net MVCappl

  - by suhair

  I am looking for a posterous like custom domain management for the users. The user can register a domain and should be able to point their new domain to their sub domain in the web application. Any ideas?

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• problem in printing floating point

  - by kudi

  hi I am using IAR c compiler, I am trying to print floating point value like printf("version number: %f\n",1.4); but I am always getting like below in console version number:ERROR help please thanks in advance kudi

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• How to draw a single point with .Net?

  - by SoMoS

  Hello, this should be pretty simple but I don't get it. How can I draw a single point in .Net? If I use g.DrawLine(Black,0,0,0,0) nothing is drawn and if I use g.DrawLine(Black,0,0,1,0) a line with 2 dots is used. The same happens with g.DrawRectangle. This has me intrigued. Thanks in advance.

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• connecting power point and excel

  - by silverkid

  how to connect power point and excel such that each slide in the powerpoint slideshow shows next excel cell in the cell in column A of excel.

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• How to use gdb to find a floating point exception in g++ code

  - by Phenom

  I have a g++ program that runs without user input. Somewhere the program is interrupted and it says "Floating point exception." Can gdb help me find what's causing this in my code?

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• If I want to setup a website like stackoverflow, where is the starting point

  - by Buzz

  Hi, guys, I find stackoverflow is very friendly, professional and easy to use. Goole webiste is great too. I knows little of web site development, since most of my time was working on C++. There are many choices, so where is the start point, asp, jsp, python, php, etc? Which technology I should use? Which books are essential to website dev?

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• static wsdl for a certain end point

  - by Costa

  Hi A certain EndPoint in a web service is not likely to change a lot, also it had a problem which we worked around by putting a static wsdl to the whole web service like this <serviceMetadata httpGetEnabled="true" httpGetUrl="" externalMetadataLocation="http://IP:8250/wsdl.xml"/> Now I want the rest of end points to have a wsdl dynamically created, and one end point which require a static WSDL. I think this is impossible because there is one WSDL per WCF service.

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• Inserting a WAV at a certain point in an audio file using python

  - by Onion

  My problem is the following: I have a 2-minute long WAV file, and my aim is to insert another WAV file (7 seconds long), at a certain point in the first WAV file (say, 0:48), essentially combining the two WAVs, using python. Unfortunately I haven't been able to figure out how to do that, and was wondering if there was some obvious solution that I was missing, or if it is even feasible to do with python. Is there perhaps a library available that might provide a solution? Thanks to all in advance.

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