Question

In MATLAB:

1) For the functions fscanf and textscan, write a script for each function to compare them.

The first script will read the DATA.txt file by using fscanf and then plot each temperature data monthly.

The second script, which reads DATA.txt file but uses the textscan function, and plot each temperature data monthly.

DATA.txt

        ave.temp        ave.high.temp   ave.low.temp    highest.rec.temp        lowest.rec.temp
Jan     31.60   38.60   24.60   69.00   -4.00
Feb     31.70   39.20   24.30   69.00   -11.00
Mar     39.00   47.10   31.10   83.00   7.00
Apr     48.90   58.20   39.70   95.00   15.00
May     58.90   68.70   49.20   95.00   30.00
Jun     67.80   76.90   58.60   96.00   36.00
Jul     73.10   81.70   64.50   99.00   48.00
Aug     71.90   79.90   63.90   100.00  44.00
Sep     66.00   73.80   58.10   96.00   36.00
Oct     56.10   64.00   48.10   91.00   26.00
Nov     46.00   53.40   38.70   81.00   14.00
Dec     35.70   42.50   29.00   75.00   -7.00

Answer 1

%%first script

%using fscanf
clear
clc
f=fopen('DATA.txt','r');
header=fscanf(f,' %s ',5);
data=zeros(12,5);
for i=1:12
month=fscanf(f,'%s',1);
data(i,:)=fscanf(f,'%f %f %f %f %f',5);
end
fclose(f);
figure
plot(1:12,data)
legend('Ave temp','Ave high temp','ave low temp','highest rec temp','lowest rec temp')
xlabel('months')
ylabel('Temperature')
title('using fscanf')

%%%%%%%%%%%%%

%second script

%using textscan
clear
clc
f=fopen('DATA.txt','r');
header=textscan(f,'%s %s %s %s %s',1);
data=zeros(12,5);
data1=textscan(f,'%s %f %f %f %f %f');
data(:,1)=(data1{2});
data(:,2)=(data1{3});
data(:,3)=(data1{4});
data(:,4)=(data1{5});
data(:,5)=(data1{6});
fclose(f);
figure
plot(1:12,data)
legend('Ave temp','Ave high temp','ave low temp','highest rec temp','lowest rec temp')
xlabel('months')
ylabel('Temperature')
title('using textscan')

Figure 1 Figure 2 File Edit View Insert Tools Desktop Window Help File Edit View Insert Tools Desktop Window Help using textscan using fscanf 100 100 Ave temp -Ave temp -Ave high temp ave low temp -highest rec temp lowest rec temp Ave high temp ave low temp highest rec temp lowest rec t 60 40 20 20 -20 -20 2 10 12 10 12 months months