内容简介：Matlab处理log文件
一般文本类文件都用 java 或 python 处理方便很多，此处记录一下matlab 处理文本文件的一些语法。
例如，程序记录下的日志文件为：dl4ss_output.log_2017_03_10_210643，其部分内容为：
[Epoch: 1] - SDR:1.308344, SIR:2.063156, SAR:-1.509836, NSDR:2.908430 Epoch 1/1 50/50 [==============================] - 178s - loss: 1.9203 - val_loss: 1.7383 Epoch 1/1 50/50 [==============================] - 176s - loss: 1.6208 - val_loss: 1.5113 Epoch 1/1 50/50 [==============================] - 176s - loss: 1.4212 - val_loss: 1.3334 Epoch 1/1 50/50 [==============================] - 175s - loss: 1.2612 - val_loss: 1.1911 Epoch 1/1 50/50 [==============================] - 176s - loss: 1.1320 - val_loss: 1.0740 [Epoch: 6] - SDR:2.128937, SIR:3.154744, SAR:0.774681, NSDR:3.729023 Epoch 1/1 50/50 [==============================] - 175s - loss: 1.0312 - val_loss: 0.9913
现在想对该日志文件进行处理，并将Epoch迭代过程中评估的结果值绘制成图，方法如下：
clc
clear
colours = ’rbckgcmbkgcmbkgcmbgrcmykbgrcmykb’; % ’bgrcmykw’ modified by jacoxu@msn.com
symbols = ’.x^os*.dvph><x+^os*.dvph><+’; % ’.ox+*sdv^<>ph’ %参考 http://blog.sina.com.cn/s/blog_618af1950100kdi2.html
linetypes = {‘-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’,'-’}; % {‘-’,':’,'-.’,'–’}
figureSize = [300,200,500,300];
lineWidth = 1.5;
para_list = {‘SDR’, ’SIR’, ’SAR’, ’NSDR’};
log_file = ’dl4ss_output.log_2017_03_10_210643′;
log_file_fd = fopen(log_file);
epoch_idx = 0;
epoch_num = [];
sdr_value = [];
sir_value = [];
sar_value = [];
nsdr_value = [];
% 开始循环读取log文件
while true
% 获取当前行内容
line = fgets(log_file_fd);
% 如果当前行没有内容了
if ischar(line) == false
break
end
% 判断当前行中是否有评估值
if isempty(strfind(line, ’NSDR:’))
continue
end
epoch_idx = epoch_idx + 1;
results = regexp(line, ’ - ’, ’split’);
% 先获取当前的Epoch_num
epoch_num(epoch_idx) = str2double(results{1}(8:(length(results{1})-1)));
% 开始解析SDR, SIR, SAR 和 NSDR 值
results = results{2};
results = regexp(results, ’, ’, ’split’);
for idx = 1:length(results)
tmp_results = regexp(results{idx}, ’:', ’split’);
if strcmp(tmp_results{1}, ’SDR’)
sdr_value(epoch_idx) = str2double(tmp_results{2});
elseif strcmp(tmp_results{1}, ’SIR’)
sir_value(epoch_idx) = str2double(tmp_results{2});
elseif strcmp(tmp_results{1}, ’SAR’)
sar_value(epoch_idx) = str2double(tmp_results{2});
elseif strcmp(tmp_results{1}, ’NSDR’)
nsdr_value(epoch_idx) = str2double(tmp_results{2});
else
print (‘Error eval item’)
end
end
end
% 绘图
figure(‘position’, figureSize)
plot(epoch_num, sdr_value, [colours(1), symbols(1), char(linetypes(1))], ’linewidth’, lineWidth);
hold on;
plot(epoch_num, sir_value, [colours(2), symbols(1), char(linetypes(2))], ’linewidth’, lineWidth);
hold on;
plot(epoch_num, sar_value, [colours(3), symbols(1), char(linetypes(3))], ’linewidth’, lineWidth);
hold on;
plot(epoch_num, nsdr_value, [colours(4), symbols(1), char(linetypes(4))], ’linewidth’, lineWidth);
title(‘BSS\_Eval results’)
grid on;
xlabel(‘Epoch Number’)
ylabel(‘Value’)
axis([0 epoch_num(end) -2 5]);
legend(para_list, ’Location’, ’SouthEast’)
绘制的结果如下：
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