1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
--[[ Logger: a simple class to log symbols during training,
and automate plot generation
Example:
logger = optim.Logger('somefile.log') -- file to save stuff
for i = 1,N do -- log some symbols during
train_error = ... -- training/testing
test_error = ...
logger:add{['training error'] = train_error,
['test error'] = test_error}
end
logger:style{['training error'] = '-', -- define styles for plots
['test error'] = '-'}
logger:plot() -- and plot
---- OR ---
logger = optim.Logger('somefile.log') -- file to save stuff
logger:setNames{'training error', 'test error'}
for i = 1,N do -- log some symbols during
train_error = ... -- training/testing
test_error = ...
logger:add{train_error, test_error}
end
logger:style{'-', '-'} -- define styles for plots
logger:plot() -- and plot
-----------
logger:setlogscale(true) -- enable logscale on Y-axis
logger:plot() -- and plot
]]
local Logger = torch.class('optim.Logger')
function Logger:__init(filename, timestamp)
if filename then
self.name = filename
os.execute('mkdir ' .. (sys.uname() ~= 'windows' and '-p ' or '') .. ' "' .. paths.dirname(filename) .. '"')
if timestamp then
-- append timestamp to create unique log file
filename = filename .. '-'..os.date("%Y_%m_%d_%X")
end
self.file = io.open(filename,'w')
self.epsfile = self.name .. '.eps'
else
self.file = io.stdout
self.name = 'stdout'
print('<Logger> warning: no path provided, logging to std out')
end
self.empty = true
self.symbols = {}
self.styles = {}
self.names = {}
self.idx = {}
self.figure = nil
self.showPlot = true
self.plotRawCmd = nil
self.defaultStyle = '+'
self.logscale = false
end
function Logger:setNames(names)
self.names = names
self.empty = false
self.nsymbols = #names
for k,key in pairs(names) do
self.file:write(key .. '\t')
self.symbols[k] = {}
self.styles[k] = {self.defaultStyle}
self.idx[key] = k
end
self.file:write('\n')
self.file:flush()
return self
end
function Logger:add(symbols)
-- (1) first time ? print symbols' names on first row
if self.empty then
self.empty = false
self.nsymbols = #symbols
for k,val in pairs(symbols) do
self.file:write(k .. '\t')
self.symbols[k] = {}
self.styles[k] = {self.defaultStyle}
self.names[k] = k
end
self.idx = self.names
self.file:write('\n')
end
-- (2) print all symbols on one row
for k,val in pairs(symbols) do
if type(val) == 'number' then
self.file:write(string.format('%11.4e',val) .. '\t')
elseif type(val) == 'string' then
self.file:write(val .. '\t')
else
xlua.error('can only log numbers and strings', 'Logger')
end
end
self.file:write('\n')
self.file:flush()
-- (3) save symbols in internal table
for k,val in pairs(symbols) do
table.insert(self.symbols[k], val)
end
end
function Logger:style(symbols)
for name,style in pairs(symbols) do
if type(style) == 'string' then
self.styles[name] = {style}
elseif type(style) == 'table' then
self.styles[name] = style
else
xlua.error('style should be a string or a table of strings','Logger')
end
end
return self
end
function Logger:setlogscale(state)
self.logscale = state
end
function Logger:display(state)
self.showPlot = state
end
function Logger:plot(...)
if not xlua.require('gnuplot') then
if not self.warned then
print('<Logger> warning: cannot plot with this version of Torch')
self.warned = true
end
return
end
local plotit = false
local plots = {}
local plotsymbol =
function(name,list)
if #list > 1 then
local nelts = #list
local plot_y = torch.Tensor(nelts)
for i = 1,nelts do
plot_y[i] = list[i]
end
for _,style in ipairs(self.styles[name]) do
table.insert(plots, {self.names[name], plot_y, style})
end
plotit = true
end
end
local args = {...}
if not args[1] then -- plot all symbols
for name,list in pairs(self.symbols) do
plotsymbol(name,list)
end
else -- plot given symbols
for _,name in ipairs(args) do
plotsymbol(self.idx[name], self.symbols[self.idx[name]])
end
end
if plotit then
if self.showPlot then
self.figure = gnuplot.figure(self.figure)
if self.logscale then gnuplot.logscale('on') end
gnuplot.plot(plots)
if self.plotRawCmd then gnuplot.raw(self.plotRawCmd) end
gnuplot.grid('on')
gnuplot.title('<Logger::' .. self.name .. '>')
end
if self.epsfile then
os.execute('rm -f "' .. self.epsfile .. '"')
local epsfig = gnuplot.epsfigure(self.epsfile)
if self.logscale then gnuplot.logscale('on') end
gnuplot.plot(plots)
if self.plotRawCmd then gnuplot.raw(self.plotRawCmd) end
gnuplot.grid('on')
gnuplot.title('<Logger::' .. self.name .. '>')
gnuplot.plotflush()
gnuplot.close(epsfig)
end
end
end
|