Undefined function or variable

I've received a script, created a file and put the code in it. While running I receive this error. As it is a script (not a function), there should not be a problem. Does anybody can guide me?

Answer 1

[KALYAN ACHARJYA]

As you mentioned that it is main scripts (Not associated function call). The error clearly stated that "Undefined function or variable"

May be you using the any custom function within the code, which is not defined in the current working directory Or you didnot defined any variable, before it is used. Please check it carefully or share the code, so that we can point the exact error.

[joly Alipor]

I would appreciate it a lot if you could help me to solve the problem. Here is the code:

freqs = 500; % Tone frequency (pitch), in Hz

rise_fall_time = .008; % Linear rise and fall time of each sound, in s.

sampleFreq = 44100; % Sampling frequency (Hz).

dt = 1/sampleFreq; % Sample steps.

sil = .040; % Duration of silence following tone, in s

sil_fill = sil*sampleFreq; % Silent gap in samples.

intlengths = [.250, .270]; % All base intervals, the minimum IOI, in seconds

amplitude = .5; % Amplitude of the tones, essentially volume

downBeat = 1; % 1 = rhythm ends on downBeat, 0 = rhythm ends as written in .txt.

intnames = '1234'; % Names of each unique interval, for filename.

outPrefix = {'ms', 'mc', 'nm'}; % Condition prefixes for output files.

inPrefix = {'MS', 'MC', 'NM'}; % Text file prefixes.

condIntervals = {[1,2,3,4]; ... % Interval ratios for each condition.

[1,2,3,4]; ...

[1,1.4,3.6,4]};

%

plotWavs = 0;

% NB: outPrefixes 'nm' will automatically use non-integer ratio intervals

% NB: outPrefix and inPrefixes should match in length and order.

%% Load text file.

for z = 1:length(outPrefix)

if isfile(strcat(inPrefix{z}, '.txt')) % Check if txt file exists, and continue if it does.

wantint = load(strcat(inPrefix{z},'.txt')); % Load the file.

condi = outPrefix{z};

%% Get durations for each unique interval.

for q = 1:length(intlengths); % Loop through tempi.

intervals = [(condIntervals{z}(1)*intlengths(q)-sil), ... % Calculate length of each unique interval.

(condIntervals{z}(2)*intlengths(q)-sil), ...

(condIntervals{z}(3)*intlengths(q)-sil), ...

(condIntervals{z}(4)*intlengths(q)-sil)];

%% Create tones with sine waves.

for i = 1:length(intervals);

t = [0:dt:intervals(i)]; % Get number of samples needed for each tone duration.

tone_dur = sin(2*pi*freqs*t); % Make sine wave for tone duration.

% Make onset/offset ramps, attach them to each tone.

tone_rise = linspace(0,1,round(rise_fall_time*sampleFreq)).*tone_dur(1:round(rise_fall_time*sampleFreq)); % Onset.

tone_fall = linspace(1,0,round(rise_fall_time*sampleFreq)).*tone_dur(end-round(rise_fall_time*sampleFreq)+1:end); % Offset.

tone_full = tone_dur(1:(length(tone_dur)-2*length(tone_rise))); % Remove length of ramps, maintaining duration.

% tone_full2 = tone_dur(1:(length(tone_dur)-2*tone_rise)); % Remove length of ramps, maintaining duration.

wavint{i} = [tone_rise, tone_full , tone_fall]; % Combine onset/offset ramps with tones.

wavint{i} = wavint{i}.*amplitude; % Set sine wave amplitude.

end

if plotWavs

figure; subplot(4,1,1); plot(tone_dur); title('Tone Duration');

subplot(4,1,2); plot(tone_rise); title('Onset Ramp');

subplot(4,1,3); plot(tone_fall); title('Offset Ramp');

subplot(4,1,4); plot(wavint{1}); title('Combined Tone');

end

%% Make each rhythm from the .txt file

for i = 1:size(wantint, 1); % For each rhythm.

stim = []; % Clear sound.

iname = ''; % Clear output wav filename.

for j = 1:size(wantint, 2); % For each interval in the rhythm.

no_we_actually_want = wantint(i,j); % The interval in the rhythm file (e.g., 1 to 4)

if no_we_actually_want >0 ;

iname = [iname '_' intnames(no_we_actually_want)]; % Add this interval to the filename

stim = [stim; wavint{no_we_actually_want}'; zeros(sil_fill,1)]; % Add this interval--tone plus silence--to the soundfile

end

end

if downBeat % Add downbeat if specified.

stim = [stim; wavint{1}'];

end

rhythm = stim; % Allocate to rhythm variable.

%% Save

save_name = [condi iname '_unit' num2str(intlengths(q)*1000) '.wav']; % Named by condition, intervals, tempo.

audiowrite(save_name,rhythm,sampleFreq); % Write the .wav file, as a single rhythm.

end

end

end

end

[KALYAN ACHARJYA]

Please us MTALAB version 2017b or more latest. I guess you are getting the "undefined function error" because of isfile.

[Steven Lord]

Can you show us the full and exact text (including all the text displayed in red) of the error message you received?

[joly Alipor]

Actually I changed the m.file's name and now the error is as follows:

Undefined function 'isfile' for input arguments of type 'char'.

Error in basic (line 44)

if isfile(strcat(inPrefix{z}, '.txt')) % Check if txt file exists, and continue if it does.