Error: File: d3.m Line: 7 Column: 10 Invalid use of operator.

datacell = textscan( regexprep( fileread('cricketData.csv'), '\$', '0' ), '%f%f', 'delimiter', ',', 'HeaderLines', 1);
Duration = datacell{1};
Input = datacell{1};
YourTable = table(Duration, Input);
temp=datacell(:,1); 
rate=datacell(:,2);
scatter((:,1)),(:,2)),'o')
xlabel('temperature(T in degrees Fahrenheit)')
ylabel('chirping (R in chirp per second))')
title('Chirping rate vs Temperature')
p=polyfit(datacell(:,1),datacell(:,2),1); 
x=min((datacell(:,1)))-2:.01:max((datacell(:,2)))+2;
hold on 
plot(x,polyval(p,x))
legend('Data points,''best fit equation')
fprintf('Calculated equation: Chirping rate(c/s)=(%.2f)(temperature (F))+%.2f\n',p)

Answer 1

[Walter Roberson]

scatter((:,1)),(:,2)),'o')

The : operator needs to have a variable or constant on each side if it when it is being used as the range-construction operator.

When : is used as a subscript by itself, then it needs to appear inside an indexing expression. For example,

scatter(rate(:,1),(2:5)),'o')
        |         |
        |         +--- range operator
        |
        +---- subscript operator

Answer 2

[James Tursa]

Looks like you are missing some variable names and some matching parentheses in this line:

scatter((:,1)),(:,2)),'o')