search for: sobel

Hello, Any advice or pointers for implementing Sobel's test for mediation in 2-level model setting? For fitting the hierarchical models, I am using "lme4" but could also revert to "nlme" since it is a relatively simple varying intercept model and they yield identical estimates. I apologize for this is an R question with an emb...

Dear R-community, I am just conducting various mediation analyses with data from individual participants who are nested in teams. I found the ?sobel.lme? function to be pretty helpful when doing so. (A big thank you to Paul Bliese for his multilevel-package and the awesome manual!) Here?s the example from the Help-file: data(bh1996) library(nlme) #A small but significant indirect effect indicates leadership mediates #the relationship between wo...

...2 -I/usr/local/include -fpic -O3 -g -c matrix.cpp -o matrix.o gcc -I/usr/lib/R/include -I/usr/lib/R/include -g -O2 -I/usr/local/include -fpic -O3 -g -std=gnu99 -c smooth.c -o smooth.o gcc -I/usr/lib/R/include -I/usr/lib/R/include -g -O2 -I/usr/local/include -fpic -O3 -g -std=gnu99 -c sobel.c -o sobel.o g++ -shared -Bdirect,--hash-stype=both,-Wl,-O1 -o rimage.so equalize.o fftw_access_func.o freqfilters.o interface.o jpegio.o laplacian.o matrix.o smooth.o sobel.o -ljpeg -lfftw -L/usr/lib/R/lib -lR ** R ** data ** help >>> Building/Updating help pages for package 'rim...

As I said in the other thread (for people using threaded mail)/in my last mail (for the rest), I'm working on the "split up the frames into textured triangles and output textures and coordinates" idea. The idea is to find edges in the image. So far I have a Sobel edge detector, a wavelet transformer (to compress the textures, still very incomplete, transform only), and some miscellaneous stuff. The problem is, the Sobel edge detector gives back a bunch of grey values (quick explanation, I calc the X and Y differences between pixels, then do edge = sqrt(xd^2...

...onfigure-vars='LDFLAGS=-L/sw/lib CPPFLAGS=-I/sw/include' /Users/ladmin/rimage_0.5-7.tar.gz . . . gcc -arch ppc -std=gnu99 -I/Library/Frameworks/R.framework/Resources/include -I/Library/Frameworks/R.framework/Resources/include/ppc -g -O2 -I/sw/include-I/usr/local/include -fPIC -g -O2 -c sobel.c -o sobel.o g++ -arch ppc -dynamiclib -Wl,-headerpad_max_install_names -mmacosx-version-min=10.4 -undefined dynamic_lookup -single_module -multiply_defined suppress -L/usr/local/lib -o rimage.so equalize.o fftw_access_func.o freqfilters.o interface.o jpegio.o laplacian.o matrix.o smooth.o sobel.o...

Hi, I''ve been trying to update Will Sobel''s sybase-ctlib adapter to pass unit tests on Rails 1.0. It''s been a slow, sloggy process for me so far, as I''ve been learning Ruby, Rails, and Sybase administration all in one go. (c: It''s been a saving grace to have a good starting point (thanks Will!...

I am using a 64 bit machine with CentOS5. I am getting the following errors when I try to install the rimage package g++ -shared -L/usr/local/lib64 -o rimage.so equalize.o fftw_access_func.o freqfilters.o interface.o jpegio.o laplacian.o matrix.o smooth.o sobel.o -ljpeg -lfftw /usr/bin/ld: /usr/local/lib/libfftw.a(fftwnd.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC /usr/local/lib/libfftw.a: could not read symbols: Bad value collect2: ld returned 1 exit status make: *** [rimage.so...

...o get out quite a lot of noise. You can find a test image and the result at http://home.student.utwente.nl/l.e.veen/test4.jpg and http://home.student.utwente.nl/l.e.veen/out.jpg. It is very simple: 1) Load the image 2) Rescale to 25% of the original size to filter out noise 3) Run a double (x/y) Sobel filter on the image (a Sobel filter just calculates the difference between two neighbouring pixel values. I'm not sure about that, but that's what I'm doing and it looks remarkably similar to the Sobel filter in Gimp) 4) Make the 10% highest values 1.0, and the rest 0.0 5) Export TGA I...

...ch {x,y} point, there is an Int8 value between 0 and 255. Take a small 4x3 image. I could feed my pixels in to a flat Int8 vector of length 12. I could also feed it in to an array of length 4, of Int8 arrays of length 3. Now take 2 simple functions: one does greyscale brightening, the other does a sobel filter. The first needs only to know the value of 1 pixel at a time, i.e. to increase its value. For this, the vector option would be fine, and I assume (naively) that I'd enjoy SIMD performance over this vector, executing `add x` to each element? However, the Sobel filter needs information not...

Hi, I wonder how I should use the SET and ENUM data types in my MySQL database combined with a rails application. This is my current _form.rhtml file for products: ------------------------------------------------------------- <%= error_messages_for ''product'' %> | <!--[form:product]--> <p><label for="product_name">Name</label><br/>

...ry to ask my question on this forum. any help is very much appreciated. While trying to download the rimage package I am checking at the following step "g++ -shared -L/usr/local/lib64 -o rimage.so equalize.o fftw_access_func.o freqfilters.o interface.o jpegio.o laplacian.o matrix.o smooth.o sobel.o -ljpeg -lfftw /usr/bin/ld: /usr/local/lib/libfftw.a(fftwnd.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC /usr/local/lib/libfftw.a: could not read symbols: Bad value collect2: ld returned 1 exit status" Any ideas? Th...

...2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -c smooth.c -o smooth.o gcc -std=gnu99 -I/usr/lib64/R/include -I/usr/local/include -fpic -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -c sobel.c -o sobel.o g++ -shared -L/usr/local/lib64 -o rimage.so equalize.o fftw_access_func.o freqfilters.o interface.o jpegio.o laplacian.o matrix.o smooth.o sobel.o -ljpeg -lfftw -L/usr/lib64/R/lib -lR installing to /usr/lib64/R/library/rimage/libs ** R ** data ** preparing package for lazy loading ** h...

Dear list users, I have trouble with covariance analysis. I measured nitrate concentrations in the soil (NO3) and the percentage of legumes (LEG, continuous), affected by 2 different CO2 concentrations (CO2, discrete). I suspect that CO2 has an effect on LEG and NO3, but also that LEG has an effect on NO3, so this is the formula I wrote to test this: NO3 ~ CO2 + LEG + CO2:LEG Will LEG be

On Sat, Nov 2, 2013 at 2:48 PM, Rob Stewart <robstewart57 at gmail.com> wrote: > Hi, I'm getting started with LLVM, with the intention of writing a DSL > that compiles to LLVM IR, to target a new CPU instruction set. I have > two questions: > > 1. Multimedia IO in LLVM > > In the paper "The LLVM Instruction Set and Compilation Strategy" [1], > there is

Hi, I'm getting started with LLVM, with the intention of writing a DSL that compiles to LLVM IR, to target a new CPU instruction set. I have two questions: 1. Multimedia IO in LLVM In the paper "The LLVM Instruction Set and Compilation Strategy" [1], there is talk about a possible multimedia instruction set in a future LLVM release: "Note that LLVM is a virtual instruction

Hi, Can someone recommend a good web hosting company with relatively inexpensive, small shared host accounts with experienced Rails support and allows SVN for Trac or Collaboa projects? (I''m not thinking of SVN in SSH mode) I think I need to change hosting companies. They won''t let me use SVN in any mode. Thanks, Peter

any one know any packages can do the job describe in Michael E. Sobel's artical NEARAND LOG-NONLINEAR MODELS FOR ORDINALSCALES WITH MIDPOINTS, WITHAN APPLICATION TO PUBLIC OPINION DATA .it is said that "A set of S Plus instructions to fit the models described in Section 3 of this paper is available from Statlib at htp://lib.stat.cmu.edu/general/m...

...call my dependent variable "Y", the independent "X" and "Z" will be my mediator variable... Using a linear regression, i can say that there isn't a direct effect of X on Y because the coefficient of X isn't significative, but i've tried to use anyway the Sobel's test to find a mediation relation. The result was positive, and with a p-value of 0.03 i can say that Z have a mediator effect on the relation between X and Y. Now my question: is right think about a mediator effect of Z on the relation between X and Y, also if there isn't a direct effe...

Hello everyone,  I'm working in a project to create an special analysis about visualization in some animals and its behaviour, through checking eye movement. The point is this is very important to get data from the image as a resume of what this animal sees. I think an RGB histogram like photoshop does, but I need to get the data from this histogram analysis and I was wondering about using R