Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable subscript, as in t(rows,vars). To select variables, use t(:

perc=0.8;

ecg_simulato=[];

for k=1:length(RRi_samples)

lungh_onda=round(perc*RRi_samples(k));

lungh_segmento=RRi_samples(k)- lungh_onda;%metto degli zeri fino al

%battito successivo

ecg_simulato=[ecg_simulato ecg(lungh_onda) zeros(1,lungh_segmento)];

Error using ese_process_ecg_2122_senza_grafico (line 30)

Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable

subscript, as in t(rows,vars). To select variables, use t(:,i) or for one variable t.(i). To select rows, use t(i,:).

THIS IS THE ECG FUNCTION:

function x = ecg(L)

%ECG Electrocardiogram (ECG) signal generator.

% ECG(L) generates a piecewise linear ECG signal of length L.

% The ECG signal must be filtered (smoothed) with an N-point

% smoother e.g., Savitzky-Golay FIR filter.

%

% EXAMPLE:

% x = ecg(500).';

% y = sgolayfilt(x,0,3); % Typical values are: d=0 and F=3,5,9, etc.

% y5 = sgolayfilt(x,0,5);

% y15 = sgolayfilt(x,0,15);

% plot(1:length(x),[x y y5 y15]);

%

% See also SGOLAYFILT, ADAPTNCDEMO.

% Author(s): R. Losada

% Copyright 1988-2002 The MathWorks, Inc.

a0 = [0,1,40,1,0,-34,118,-99,0,2,21,2,0,0,0]; % Template

d0 = [0,27,59,91,131,141,163,185,195,275,307,339,357,390,440];

a = a0 / max(a0);

d = round(d0 * L / d0(15)); % Scale them to fit in length L

d(15)=L;

for i=1:14,

m = d(i) : d(i+1) - 1;

slope = (a(i+1) - a(i)) / (d(i+1) - d(i));

x(m+1) = a(i) + slope * (m - d(i));

end

% [EOF]

[Voss]

Can you please share the complete function or script ese_process_ecg_2122_senza_grafico?

Answer 1

[Cris LaPierre]

When indexing a table, you need to specify row and variable (e.g. tblNm(row,'varNm')) or variable(row) (e.g. tblNm.varNm(row)). You can read more here.

For example

T = readtable('patients.xls');
T(5,8)

ans = table
    Systolic
    ________

      122   

T(5,'Systolic')

ans = table
    Systolic
    ________

      122   

T.Systolic(5)

ans = 122

% your error
T(5)

Subscripting into a table using one subscript (as in t(i)) is not supported. Specify a row subscript and a variable subscript, as in t(rows,vars). To select variables, use t(:,i) or for one variable t.(i). To select rows, use t(i,:).