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Accessing variable in a table, depending on another variable
% Create a table: is_node = false(12); is_node(2,2) = true; is_node(4,2) = true; is_node(6,2) = true; is_node(10,2) = true;...

3 years ago | 0

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How do I substract like variables from each other
a = readmatrix("Book1.xlsx"); b = datetime(a(:,2),'ConvertFrom','excel'); N = size(a,1); c = duration(NaN(N,3)); for i = 1:N...

3 years ago | 0

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I get this error, ive already checked parenthesis.Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error.
There is a comma missing: f = figure ('position', [0, 0] scrz(3),scrz(4)); % ^^ missing a comma ...

3 years ago | 0

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Need help to plot frequency axis should be linear and cover the range 10 to 110 Hz in 1 Hz steps. Your vertical axis should cover from 0 to -40 dB
% File name: ee310 project.m clear all; close all; %Specify components. Rs=1000; C1=11.65e-6; C2=250.1e-9; C3=28.13e-6;...

3 years ago | 1

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Answered
reshape matrix with diffrent size
load('vecteur.mat') % stored vecteur in a mat file, to avoid defining it in the code again here SI = scatteredInterpolant(vec...

3 years ago | 0

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Shift elements in a 3D array
Here's an example with a 2x3x2 array, removing all the 9s and appending 0s: data = reshape(1:12,[2 3 2]) siz = size(data); id...

3 years ago | 0

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Which rows of a 2-column array contain elements of 1-column array.
ismember returns linear indices as its second output. You can use ind2sub to convert to row + column indices. a = [ 6208 ...

3 years ago | 1

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Answered
Matlab menu sum values
clc msg = "Vyber hodnotu: "; vyber = ["-10000" "3000" "15000" "4000" "-6000"]; n = input("Počet pohybů na účtu: "); choice =...

3 years ago | 0

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How to change scaling for different ranges of X-Axis inn figures?
Use set(gca(),'XScale','log') or semilogx.

3 years ago | 1

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How to plot a function F(a,b) having a matrix F (axb)
surf(phi,sigmap,syy)

3 years ago | 0

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How can I change all numbers in matrix to 1? except for 0
One way: M = randi(4,[5 5])-2 % a matrix with zero and non-zero elements M(M ~= 0) = 1 % replace non-zero elements with ones ...

3 years ago | 0

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Working with a cell of strings
Use string or cellstr. C = {"one";"two"} string(C) cellstr(C)

3 years ago | 0

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Element-wise set operations
C = A == B.';

3 years ago | 0

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Finite Element: Filling nxm matrix by extracting values from another nx1 matrix
V(2:5,2:5) = reshape(W,4,[]).';

3 years ago | 0

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Finding slope for the polyfit line
polyfit returns the coefficients in a vector, with the highest-degree coefficient first. Therefore, the slopes are the values of...

3 years ago | 0

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plotting 12 graphs in one figure
load data_matrix.mat data=SECTION_L; data(:,1:3)=[]; row=9; cleanup=data([1 2 3 row],:); % year range y1 = 1975; y2 = 201...

3 years ago | 0

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how to create a new variable based off an if else statement on one variable?
t = table(["cats";"dogs";"cats";"sheep"],'VariableNames',"animals") all_animals = ["dogs" "cats" "sheep"]; [~,idx] = ismembe...

3 years ago | 0

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Answered
Can I use colormap to set color of my cumulative area chart in area()?
area dioesn''t use the figure's colormap directly, but it does use the axes' ''ColorOrder' by default, so maybe something like t...

3 years ago | 0

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extract values from a table
It looks like, basically row 1 is year, row 2 is month, row 3 is day of month, and row 4 through the end are temperature data fo...

3 years ago | 0

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indeHow to index values from a cell array
data =readtable('EURUSD=X.csv'); disp(data) G = floor((0:height(data)-1)/20).' + 1; DataE20 = splitapply(@(Date,Open,High,Low...

3 years ago | 0

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Answered
how to use "randi" in specific case?
Maybe something like this (the example A requires at least 5 values, e.g., [10 15 20 25 30]): A = [ ... 0 0 1 0 0 0 0 0 0 ...

3 years ago | 0

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How to make certain indexes of a cell array empty?
pixelBlock{by + 1, bx + 1} = [];

3 years ago | 0

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How to initialize a table column to a character array?
% a table: filetext = table([1;2;3;4;5;6]) % append a column of all 'MET' on the right: filetext{:,end+1} = 'MET'

3 years ago | 0

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Custom heat maps- How to highlight a specific value in the heatmap
Maybe one of the following two approaches will be useful, depending on exactly what you want to see. First, make up some data: ...

3 years ago | 1

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How to plot amplitude values of a matrix (dimension 651 by 10) with colorcode
How about this? load('amp.mat') load('cluster.mat') colors = 'gkcrw'; for ii = 1:5 idx = find(cluster == ii); pl...

3 years ago | 0

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'This statement is incomplete' for a function with enough parameters
This error can happen when there is a syntax error within the function itself (not just the line defining the function signature...

3 years ago | 0

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Answered
Combining rows of each field within a structure
S = load('Combined_Structure.mat','ModOutRstance_interp_x_all'); new_struct = struct(); f = fieldnames(S.ModOutRstance_inter...

3 years ago | 0

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why when i import an image from my desktop the error says it doesnt exist plz help and thank u in advance
Use both output arguments from uigetfile to construct the full path name of the file: [filename,pathname] = uigetfile(); ful...

3 years ago | 0

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Answered
please can someone tell me what to do here what does it mean ? and does setappdata fall under a certain library i need to install for matlab plz help
setappdate(0,'filename',filename); % ^ this should be an "a". setappdata not setappdate

3 years ago | 0

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Getting different values when indexing with islocalmax and find
The reason the elements of max_A_2 and max_A are not all equal has to do with how the results of indexing with a logical matrix ...

3 years ago | 0