Question

My error is the ever popular ::::Error using fprintf Invalid file identifier. Use fopen to generate a valid file identifier. Error in pro1 (line 7) fprintf(fileID,'edges\t initial_nodes\t nodes_after_reduction\t difference \n')

prompt="enter g value"; g=input(prompt);%To choose the type of graph if g == 1 fileID = fopen('output2\cycle_graph_o...

8 months ago | 1 answer | 0

Question

My error is the ever popular ::::Error using fprintf Invalid file identifier. Use fopen to generate a valid file identifier. Error in pro1 (line 7) fprintf(fileID,'edges\t initial_nodes\t nodes_after_reduction\t difference \n')

if g == 1 fileID = fopen('output2\cycle_graph_output.txt','w')%Creates a output text file in folder output2 ...

8 months ago | 1 answer | 0

Question

how to avoid floating point error and figure out a way to break out of this loop such that it generates correct answer

function [] = lanczos(A, m) this is a function whick takes A as input which is a matrix and reduces it to smaller size. And i ...

1 year ago | 1 answer | 0

Question

creating a matrix in matlab using a text file

type output.txt; A = readmatrix('output.txt'); A This is the output.txt file [[1 2 2 0 0] [2 1 0 0 2] [2 0 1 2 0] [0 0...

1 year ago | 1 answer | 0

Question

read a matrix from a text file

im trying to read a text file containing matrix A = readmatrix('output1.txt','Whitespace',' []'); when i execute it its displ...

1 year ago | 2 answers | 0

Question

how can i give output of a python file as input to a matlab matrix

function [] = lanczos(A, m) this is a function i'm using in matlab. the parameter 'A' is matrix and i want to give input to A f...

1 year ago | 1 answer | 0

Question

Assign a part of file name to a variable

myfolderinfo = dir('some_random_folder') ; N = length(myfolderinfo) ; for i = 3:N thisfile = myfolderinfo(i).name so...

1 year ago | 1 answer | 0

Question

iterate through multiple files in a folder

function [] = lanczos(A, m) A = readmatrix('output1.txt','Whitespace',' []'); here A reads a single text file. But i wanted ...

1 year ago | 1 answer | 0

Question

reading large text files into matrix

im trying to read a text file containing matrix A = readmatrix('output1.txt','Whitespace',' []'); when i execute it its displ...

1 year ago | 1 answer | 0

Question

iterate through text files and read them as a matrix

myfolderinfo=dir('dense_gnm_random_graph');%dense_gnm_random_graph is the folder which contains text files N=length(myfolderinf...

1 year ago | 1 answer | 0

Question

generate unit vectors based on matrix size

function [] = lanczos(A, m) A = readmatrix('output1.txt','Whitespace',' []'); [n,k] = size(A); V = zeros(k,k); %V(:,2) = ran...

1 year ago | 1 answer | 0

Question

how to break from the following for loop when beta( J+1) become zero

for j=2:inf w = A*V(:,j) - beta(j)*V(:,j-1); alpha(j) = w'*V(:,j); w = w - alpha(j)*V(:,j); beta(j+1) = norm...

1 year ago | 1 answer | 0