schluppeck

function b = most_change(a)
% most_change - calculate who is richest
%
% ds 2019-11-12, cody problem #9


money = a .* [0.25 0.1 0.05 0.01];
 
total_money  = sum(money, 2);

schluppeck

function y = pizza(z,a)
% pizza - calculate the volume of a pizza
%
% ds, 2019-11, cody problem 167

% area of pizza 
% A = pi .* z .^ 2;

% volume
% y = A .* a;

schluppeck

Graphs in Matlab

example of using graph (in mathematical sense) functions. H/t to question from lpycmm during last matlab lab class

ds 2019-10-31, halloween. denis schluppeck

tl;dr

Matlab is awesome and of course there is a way to do it - even though I didn't know too much about all the available functions until I started looking a bit more 😉

schluppeck

Reality check on design matrices

Denis Schluppeck, 2019-10-27

A quick note to answer some questions that came up during a Functional Imaging Methods class (related to GLM/design matrices).

Including a quick example of

1. how to load in txt files (matlab code)
2. look at design matrix

schluppeck

Assuming you have some vtk or similar files, you use paraview with appropriate flags to start up in 3d render mode"

/Applications/ParaView-5.5.0.app/Contents/MacOS/paraview --stereo --stereo-type=Anaglyph

For freesurfer files and related, you will first have to convert to appropriate format, using mris_convert.

schluppeck

% getting pRFStimImage from multiple files
%
% ds 2019-07-09

% task: get stimimage info out of mat file

% go to Etc folder of mrLoadRet directory
cd('Etc')

% find mat files that fit the bill (only retinotopy type)

schluppeck

# brew install ffmpeg if required
# then assuming you want to save out a canon Quicktime-trimmed MOV file to MP4 (for eg. twitter)

ffmpeg -i resized.mov -vcodec h264 -acodec mp2 resized-twitter.mp4

schluppeck

example of using montage()

... with rendered zstat images from fsl (cf https://schluppeck.github.io/dafni/matlab_images/)

The matlab montage command can handle different colormaps, indices, etc. Check out the documentation and also have a look at the snipptes of code in montageWithRender.m, which produces acceptable results:

doc montage()

schluppeck

if (!require("pacman")) install.packages("pacman")
pacman::p_load(dplyr, venneuler)
pacman::p_load_current_gh('trinker/textshape', 'thomasp85/ggforce')


x <- matrix(sample(0:4, 80, TRUE, c(.6, .1, .1, .1, .1)), ncol=4)

colnames(x) <- LETTERS[1:4]

schluppeck

license: gpl-3.0
height: 700
scrolling: no
border: yes