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function [ ] = modifyEdges( pre_old, pre_new )
% This function will allow users to add or delete edges from the network.
%
% Input:
% pre_oldstructure_input.txt-- old structure file that is just used to make sure the node order is consistent
% pre_oldmodify_edge.txt-- file with network structure after modification
%
% Output:
% pre_newstructure_input.txt-- structure file with edges added/deleted.
% pre_newstructure_input_temp.txt-- structure file with model averaging scores.
% September 16, 2020: I am only writing the file with model averaging scores
% if no edges were added to the network.
%
% open file for input, include error handling
dfile=strcat(pre_old,'structure_input.txt');
fin = fopen(dfile,'r');
if fin < 0
error(['Could not open ',dfile,' for input']);
end
% open file for input, include error handling
mfile=strcat(pre_old,'modify_edge.txt');
fin2 = fopen(mfile,'r');
if fin2 < 0
error(['Could not open ',mfile,' for input']);
end
% Read in first line to get the number of nodes
nnodes = str2num(fgetl(fin2));
% Read in first line of old structure file to get the node labels.
buffer = fgetl(fin); %get header line as a string
labels = cell(1,nnodes);
for j=1:nnodes
[next,buffer] = strtok(buffer);
labels{j} = next;
end
%Read in network structure information
buffer = fgetl(fin2);
buffer = buffer(2:end-1);
buffer = strrep(buffer,"\"","");
labels2 = cell(1,nnodes);
for j=1:nnodes
[next,buffer] = strtok(buffer,",");
labels2{j} = next;
end
nedges = str2num(fgetl(fin2));
buffer = fgetl(fin2);
buffer = buffer(2:end-1);
buffer = strrep(buffer,"\"","");
sources = cell(1,nedges);
for j=1:nedges
[next,buffer] = strtok(buffer,",");
sources{j} = str2num(next);
end
buffer = fgetl(fin2);
buffer = buffer(2:end-1);
buffer = strrep(buffer,"\"","");
targets = cell(1,nedges);
for j=1:nedges
[next,buffer] = strtok(buffer,",");
targets{j} = str2num(next);
end
buffer = fgetl(fin2);
buffer = buffer(2:end-1);
weights = cell(1,nedges);
for j=1:nedges
[next,buffer] = strtok(buffer,",");
weights{j} = next;
end
%label_map is the index in "labels" that corresponds to each label in "labels2"
label_map = cell(1,nnodes);
for i = 1:nnodes
current = labels2{i};
for j = 1:nnodes
if strcmp(current,labels{j})
label_map{i} = j;
endif
end
end
edges_out = cell(nnodes,nnodes);
scores_out = cell(nnodes,nnodes);
for i = 1:nedges
source_i = label_map{sources{i}};
target_i = label_map{targets{i}};
scores_out(source_i,target_i) = weights{i};
edges_out(source_i,target_i) = "1";
end
tf = cellfun('isempty',edges_out);
edges_out(tf) = {"0"};
scores_out(tf) = {"0"};
test_score = 1;
for i=1:nnodes
for j=1:nnodes
if strcmp(scores_out{i,j},"1.1")
test_score = 0;
end
end
end
if test_score == 1
outfile = strcat(pre_new,'structure_input_temp.txt');
fout = fopen(outfile,'w');
fprintf(fout,'%s\t',labels{1:end-1});
fprintf(fout,'%s\t\n',labels{end});
for i = 1:nnodes
fprintf(fout,'%s\t',scores_out{i,1:end-1});
fprintf(fout,'%s\t\n',scores_out{i,end});
end
fclose(fout);
end
outfile2 = strcat(pre_new,'structure_input.txt');
fout2 = fopen(outfile2,'w');
fprintf(fout2,'%s\t',labels{1:end-1});
fprintf(fout2,'%s\t\n',labels{end});
for i = 1:nnodes
fprintf(fout2,'%s\t',edges_out{i,1:end-1});
fprintf(fout2,'%s\t\n',edges_out{i,end});
end
fclose(fout2);
end
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