matlab 绘制caffe accuracy与loss曲线

1、问题描述

在caffe中微调自己的模型时，将日志文件保存为log.txt，再对其进行解析，绘制accuracy及loss曲线；

2、matlab实现

clc;
clear;

% load the log file of caffe model
fid = fopen('log.txt', 'r');
tline = fgetl(fid);

%get arrays to draw figures
accuracyIter = [0];%accuracy横坐标
accuracyArray = [0];%accuracy纵坐标
lossIter = [0];%loss横坐标
lossArray = [0];%loss纵坐标

%record the last line
lastLine = '';

%read line
while ischar(tline)
    %%%%%%%%%%%%%% the accuracy line %%%%%%%%%%%%%%
    k = strfind(tline, 'Test net output');
    if (k)
        k = strfind(tline, 'accuracy');
        if (k)
            % If the string contain test and accuracy at the same time
            % The bias from 'accuracy' to the float number
            indexStart = k + 11; 
            indexEnd = size(tline);
            str = tline(indexStart : indexEnd(2));
            accuracyArray = [accuracyArray, str2num(str)];
        end

        % Get the number of index
        k = strfind(lastLine, 'Iteration');
        if (k)
            indexStart = k + 10;
            indexEnd = strfind(lastLine, ',');
            str2 = lastLine(indexStart : indexEnd - 1);
            accuracyIter  = [accuracyIter, str2num(str2)];
        end

        % Concatenation of two string
        res_str = strcat(str2, '/', str);
    end

    %%%%%%%%%%%%%% the loss line %%%%%%%%%%%%%%
    k1 = strfind(tline, 'Iteration');
    if (k1)
       k2 = strfind(tline, 'loss');
       if (k2)
           indexStart = k2 + 7;
           indexEnd = size(tline);
           str1 = tline(indexStart:indexEnd(2));
           indexStart = k1 + 10;
           indexEnd = strfind(tline, ',') - 1;
           str2 = tline(indexStart:indexEnd);
           res_str1 = strcat(str2, '/', str1);
           lossIter  = [lossIter,  str2num(str2)];
           lossArray = [lossArray, str2num(str1)];
       end
    end

    lastLine = tline;
    tline = fgetl(fid);    
end

%draw figure
figure;h1 = plot(accuracyIter, accuracyArray);title('iteration vs accurancy');%绘制accuracy曲线
figure;h2 = plot(lossIter, lossArray);title('iteration vs loss');%绘制loss曲线

参考：知乎Oh233在https://www.zhihu.com/question/36652304中的回答