On 27.03.2016 07:08, JHickey wrote:

But with the following example, I get the error below:

elist2 = np.array([[0,1, 1], [1, 2, 0]]) #edge list with edge property map value in 3rd column g = gt.Graph() my_eprop = g.new_edge_property('bool') g.add_edge_list(elist2, eprops=my_eprop)

The 'eprops' parameter expects a list. The last line should have been:

g.add_edge_list(elist2, eprops=[my_eprop])

Best, Tiago

Sir,

How to add multiple edge properties? If my_eprop and other_eprop are two arrays of edge properties and there is another column of values in elist2, then

g.add_edge_list(elist2,eprops=[my_eprop,other_eprop])

Is this correct or not?

This doesn't give any error but it takes only the second property column from elist2 while ignores the first one.

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I have a data frame where I have five columns. First two columns are the source and sink nodes of interaction while the other three columns are three kinds of edge properties.

*import pandas as pd import graph_tool as gt

df = pd.DataFrame({'S':['a','b','c'], 'D':['b','c','a'], 'w1':[0.2,0.5,0.6], 'w2':[0.4,0.55,0.99], 'w3':[1,3,5]})

g = gt.Graph()

eprop1 = g.new_edge_property('float') eprop2 = g.new_edge_property('float') eprop3 = g.new_edge_property('int')*

Now if I want to add this to the properties to my network then

*g.edge_properties['eprop1'] = eprop1 g.edge_properties['eprop2'] = eprop2 g.edge_properties['eprop3'] = eprop3 *

and to assign values to the edge properties to the network I can write the command

*g.add_edge_list(df.values.tolist(),hashed=True, string_vals=True,eprops=[eprop1]) *

My question is: *'How do I assign values to the other two edge properties eprop2 and eprop3 from the DataFrame columns ?*

Something like, I guess:

*g.add_edge_list(df.values.tolist(),hashed=True, string_vals=True,eprops=[eprop1,eprop2,eprop3]) *

I tried this but it doesn't work.

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Its' working when I changed the edge property type 'int' to 'float' for the last one.

Also, the assigned property values are reversed in order when I tried the same for another example with only two property maps.

So for now, the problem seems to have solved.

Graph Tool version is 2.27

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*import graph_tool as gt

netCoex = gt.Graph() *#create a network * coeff_prop = netCoex.new_edge_property("float") *# create a network edge property *pvals_prop = netCoex.new_edge_property("float")*

*netCoex.edge_properties['coeff'] = coeff_prop netCoex.edge_properties['pvals'] = pvals_prop*

*var = [['a','b','c','d','e'],['b','c','a','e','b'],[0.33,0.55,0.76,0.87,0.55],[0.12,0.012,0.004,0.0021,0.03]]

dfConet = pd.DataFrame({ 'Node1' : var[0], 'Node2' : var[1],'PearCoeff' : var[2], 'PVal' : var[3]})*

# Because you have two extra columns in the dataframe so you must pass two lists to the eprops argument

#Also for two properties it adds property values in reverse order. Why this is the problem ? # I defined coeff_prop first and pvals_prop later. But it doesn't reads the columns in this order.

#So variable added first (coeff_prop) is # assigned the last column and vice versa for the other variable pvals_prop

*coeffProp = netCoex.add_edge_list(dfConet.values.tolist(),hashed=True, string_vals=True,eprops=[pvals_prop,coeff_prop])*

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