# Science Machine

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C++, MATLAB, Fortran

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**Feeds**

Question

Binary format that Matlab can read, and how to convert with C/c++?

My current procedure is not optimal. It is: extract terabytes of data with c++. Naivly writing that to disk in ascii format ...

1 year ago | 1 answer | 0

### 1

answerCluster uses only one node, even though 5 nodes Running (parfor)

I realized, I needed to explicitly pass the number of procs, such as totalProcCount=2*48 % 2 nodes, each node has 48 process...

2 years ago | 0

| accepted

Question

spmd - tag result of computation and send to only one worker while avoid deadlocking

I am creating an array within a spmd bloc, and would like to tag the array as 'c' . I don't care which worker gets that array, ...

2 years ago | 0 answers | 0

### 0

answersQuestion

Cluster uses only one node, even though 5 nodes Running (parfor)

I am running on our cluster an .m file which contains parfor loops. Using a cluster config file (below), I request 5 nodes, eac...

2 years ago | 2 answers | 0

### 2

answersQuestion

Reorder vector without for loop

I would like to do the following without using the for loop: for delta=1:540 % get circle points from the line. vectorB((d...

2 years ago | 1 answer | 0

### 1

answerQuestion

3d Matrix - Extract Subarray and Multiply by Conjugate Transpose without Forloops

I have a 3d matrix A(i,j,k) of size [1:100,1:10000,1:989]. On the kth index I want to extract the 989 elements into a vector an...

2 years ago | 1 answer | 0

### 1

answerQuestion

Tall three dimensional arrays

I am determine if the following is both doable and beneficial use of tall arrays: Let's say I have a set of larger matrices A...

2 years ago | 1 answer | 0

### 1

answerQuestion

GpuArrays and Subtracting out the Mean

I have a gpuArray A = rand(5,5,3 ,'gpuArray') which i think of as 3 5x5 matrices. I would like to find the elementwise averag...

2 years ago | 1 answer | 0

### 1

answerQuestion

run background function on subset of allocated parpool nodes on cluster?

Is it possible to start a parpool, then run a background function on a subset of the parpool's allocated nodes (on a cluster)? ...

2 years ago | 0 answers | 0

### 0

answersQuestion

Use cell instead of struct, while keeping data's organization

I have a multi-level structure Struct1=u(t).a(p).b(q).c(r).dat, where each field has hundreds of subfields. Initially I am ...

2 years ago | 0 answers | 0

### 0

answersQuestion

Confirm if Parallel Server is installed on cluster

How can I confirm my cluster has a matlab Parallel Server license? I asked the sys admin and they were not clear on that point...

2 years ago | 1 answer | 0

### 1

answerQuestion

Alternative to using Multi-level field struct

I am taking two populated structs and re-ordering them, so that I can do an operation(such as fft), on the end-most field's elem...

2 years ago | 2 answers | 0

### 2

answersQuestion

Making use of multiple harddrives to avoid IO bottlenecks?

I am reading in a lot of data (1.5 terabyte). So I would like to minimize disk IO. I have 4 NVME drives (2 tb each) 'a lot'...

2 years ago | 1 answer | 0

### 1

answerQuestion

Reorganizing current data structure in order to take advantage of GPU

I currently have nested structures like myStructreadIn(var1).NestedLevel1(var2)NestedLevel2(var3).dat(vector); Step (1) I...

2 years ago | 1 answer | 0

### 1

answerQuestion

3 level nested structs leading to out of memory

I'm initializing nested structs as: struct('nestedLevelOne', repmat({struct('nestedLevelTwo',repmat({zeros(1,1080)}, [1,540]))}...

2 years ago | 1 answer | 0

### 1

answerQuestion

Reordering Nested fields of structs and using Parfor

1. Rough Idea of my Procedure - Juggle Nested Structures according to what Parameter I need to Operate On I am reading in a hug...

2 years ago | 0 answers | 0