Matlab Filter using UItables - matlab

I am trying to create a function so that when I add a value to an edit field and push a button, only certain data displays from my data table. Like a filter. Please help. I am new to MATLAB. Thank you!
t = readtable('us-states.xlsx');
app.UITable.Data = t;
Filter = app.FIPSIDEditField.Value;
numRows = size (app.t,1);
k=1;
for i = 1:numRows
if app.UITable.Data{i,4} == Filter
RowstoDel(1,k) = i;
k = k + 1;
end
end

Related

How to loop through the columns of a Matlab table by using the headings?

I am trying to make a for-loop for the Matlab code below. I have named each column with JAN90, FEB90, etc. all the way up to AUG19, which can be found in a matrix named "data". At this point I need to change the month and year manually to obtain the result I want. Is there a way to iterate over the columns by the column name? Would it be easier to name the columns Var1, Var2 etc.?
clear;
clc;
data = readtable('Data.xlsx','ReadVariableNames',false);
data(1,:) = [];
data.Var2 = str2double(data.Var2);
data.Var3 = str2double(data.Var3);
data.Var4 = str2double(data.Var4);
data.Var5 = str2double(data.Var5);
data.Var6 = str2double(data.Var6);
data.Var7 = str2double(data.Var7);
data.Var8 = str2double(data.Var8);
data.Var9 = str2double(data.Var9);
data.Var10 = str2double(data.Var10);
data.Var11 = str2double(data.Var11);
data.Var12 = str2double(data.Var12);
data.Var13 = str2double(data.Var13);
data(:,1) = [];
data = table2array(data);
data = array2table(data.');
data = table2cell(data)
data = cell2table(data, 'VariableNames',{'JAN90','FEB90','MAR90','APR90','MAY90','JUN90','JUL90','AUG90'...
,'SEP90','OCT90','NOV90','DEC90','JAN91','FEB91','MAR91','APR91','MAY91','JUN91','JUL91','AUG91'...
,'SEP91','OCT91','NOV91','DEC91','JAN92','FEB92','MAR92','APR92','MAY92','JUN92','JUL92','AUG92'...
,'SEP92','OCT92','NOV92','DEC92','JAN93','FEB93','MAR93','APR93','MAY93','JUN93','JUL93','AUG93'...
,'SEP93','OCT93','NOV93','DEC93','JAN94','FEB94','MAR94','APR94','MAY94','JUN94','JUL94','AUG94'...
,'SEP94','OCT94','NOV94','DEC94','JAN95','FEB95','MAR95','APR95','MAY95','JUN95','JUL95','AUG95'...
,'SEP95','OCT95','NOV95','DEC95','JAN96','FEB96','MAR96','APR96','MAY96','JUN96','JUL96','AUG96'...
,'SEP96','OCT96','NOV96','DEC96','JAN97','FEB97','MAR97','APR97','MAY97','JUN97','JUL97','AUG97'...
,'SEP97','OCT97','NOV97','DEC97','JAN98','FEB98','MAR98','APR98','MAY98','JUN98','JUL98','AUG98'...
,'SEP98','OCT98','NOV98','DEC98','JAN99','FEB99','MAR99','APR99','MAY99','JUN99','JUL99','AUG99'...
,'SEP99','OCT99','NOV99','DEC99','JAN00','FEB00','MAR00','APR00','MAY00','JUN00','JUL00','AUG00'...
,'SEP00','OCT00','NOV00','DEC00','JAN01','FEB01','MAR01','APR01','MAY01','JUN01','JUL01','AUG01'...
,'SEP01','OCT01','NOV01','DEC01','JAN02','FEB02','MAR02','APR02','MAY02','JUN02','JUL02','AUG02'...
,'SEP02','OCT02','NOV02','DEC02','JAN03','FEB03','MAR03','APR03','MAY03','JUN03','JUL03','AUG03'...
,'SEP03','OCT03','NOV03','DEC03','JAN04','FEB04','MAR04','APR04','MAY04','JUN04','JUL04','AUG04'...
,'SEP04','OCT04','NOV04','DEC04','JAN05','FEB05','MAR05','APR05','MAY05','JUN05','JUL05','AUG05'...
,'SEP05','OCT05','NOV05','DEC05','JAN06','FEB06','MAR06','APR06','MAY06','JUN06','JUL06','AUG06'...
,'SEP06','OCT06','NOV06','DEC06','JAN07','FEB07','MAR07','APR07','MAY07','JUN07','JUL07','AUG07'...
,'SEP07','OCT07','NOV07','DEC07','JAN08','FEB08','MAR08','APR08','MAY08','JUN08','JUL08','AUG08'...
,'SEP08','OCT08','NOV08','DEC08','JAN09','FEB09','MAR09','APR09','MAY09','JUN09','JUL09','AUG09'...
,'SEP09','OCT09','NOV09','DEC09','JAN10','FEB10','MAR10','APR10','MAY10','JUN10','JUL10','AUG10'...
,'SEP10','OCT10','NOV10','DEC10','JAN11','FEB11','MAR11','APR11','MAY11','JUN11','JUL11','AUG11'...
,'SEP11','OCT11','NOV11','DEC11','JAN12','FEB12','MAR12','APR12','MAY12','JUN12','JUL12','AUG12'...
,'SEP12','OCT12','NOV12','DEC12','JAN13','FEB13','MAR13','APR13','MAY13','JUN13','JUL13','AUG13'...
,'SEP13','OCT13','NOV13','DEC13','JAN14','FEB14','MAR14','APR14','MAY14','JUN14','JUL14','AUG14'...
,'SEP14','OCT14','NOV14','DEC14','JAN15','FEB15','MAR15','APR15','MAY15','JUN15','JUL15','AUG15'...
,'SEP15','OCT15','NOV15','DEC15','JAN16','FEB16','MAR16','APR16','MAY16','JUN16','JUL16','AUG16'...
,'SEP16','OCT16','NOV16','DEC16','JAN17','FEB17','MAR17','APR17','MAY17','JUN17','JUL17','AUG17'...
,'SEP17','OCT17','NOV17','DEC17','JAN18','FEB18','MAR18','APR18','MAY18','JUN18','JUL18','AUG18'...
,'SEP18','OCT18','NOV18','DEC18','JAN19','FEB19','MAR19','APR19','MAY19','JUN19','JUL19','AUG19'});
m = [1 2 3 6 12 24 36 60 84 120 240 360]';
for i=1:100
t = i;
data.X_1 = (1-exp(-m./t))./(m./t);
data.X_2 = ((1-exp(-m./t))./(m./t))-exp(-m./t);
model_1 = fitlm(data, 'FEB95 ~ X_1 + X_2');
RSS(100,:) = zeros ;
res = model_1.Residuals.Raw;
res(any(isnan(res), 2), :) = [];
RSS(i) = sum(res.^2);
end
RSS(:,2) = [1:1:100];
min = min(RSS(:,1));
t = find(RSS(:,1) == min)
data.X_1 = (1-exp(-m./t))./(m./t);
data.X_2 = ((1-exp(-m./t))./(m./t))-exp(-m./t);
model_1 = fitlm(data, 'FEB95 ~ X_1 + X_2')
res = model_1.Residuals.Raw;
res(any(isnan(res), 2), :) = [];
RSS = sum(res.^2)
intercept = model_1.Coefficients.Estimate(1,1);
beta_1 = model_1.Coefficients.Estimate(2,1);
beta_2 = model_1.Coefficients.Estimate(3,1);
Yhat = intercept + beta_1.*data.X_1 + beta_2.*data.X_2;
plot(m, Yhat)
hold on
scatter(m, data.FEB95)
I.e "FEB95" should be dynamic? Any suggestions?

Her is how I would approach your problem. First realize that VarNames=data.Properties.VariableNames will get a list of all column names in the table. You could then loop over this list. For example
for v=VarNames
current_column = v{1};
% ....
% Define the model spec for the current column
model_spec = [current_column ' ~ X_1 + X_2'];
% and create the model
model_1 = fitlm(data, model_spec);
% ... Continue computation ... and collect results in a table or array
end

Calculating values in a for loop

I have a for loop that is storing values. For some reason, it is calculating values for all the number up to and including those in the for loop, instead of just the ones in the array.
t = 3600:50:172800;x = 0.1;y = 0; ro = 0.1;
T = zeros(1,length(t));
for Cm = 1E6:1E6:4E6
for i = 1:length(t)
T = T_ILS(x,y,ro,Cm,t);
Tall(Cm,:) = [T];
end
end
The error I get is "Requested 2000000x3385 array exceeds maximum array size preferences". I would like the for loop to calculate just the Cm values and not every number in between.

You are not computing every value in between, but your indices are messed up. Cm takes values in the millions, but you use it to index Tall(Cm,:). You probably want
t = 3600:50:172800;x = 0.1;y = 0; ro = 0.1;
T = zeros(1,length(t));
Cm = 1E6:1E6:4E6;
for j = 1:length(Cm)
for i = 1:length(t)
T(i) = T_ILS(x,y,ro,Cm(j),t(i));
end
Tall(j,:) = [T];
end
Notice that the main function call assigns to T(i) and uses t(i) in the function arguments to justify the existence of the for loop.

In the inner loop, T is the output of the function T_ILS, using the same arguments each time.
for i = 1:length(t)
T = T_ILS(x,y,ro,Cm,t);
Tall(Cm,:) = [T];
end
I don't know what this function computes, but you probably wanted to do this instead
for i = 1:length(t)
T = T_ILS(x,y,ro,Cm,t(i));
Tall(Cm,:) = [T];
end
to account for each value of the vector t, or even better:
for t = 3600:50:172800
T = T_ILS(x,y,ro,Cm,t);
Tall(Cm,:) = [T];
end
EDIT: Also, to make this answer complete, I'd like to merge #MadPhysicist's answer with mine. The result would be
Cm = 1E6:1E6:4E6; x = 0.1;y = 0; ro = 0.1;
T = zeros(1,length(t));
for i = 1:length(Cm)
for t = 3600:50:172800;
T = T_ILS(x,y,ro,Cm(i),t);
Tall(i,:) = [T];
end
end

Saving values to a vector from a loop in MATLab

I'm trying to save values from a while loop into vectors. I have the following code.
Delta_P = 1;
count = 0;
while Delta_P > 0.00001
x1 = ((y1*p)/(c1*p1));
x2 = ((y2*p)/(c2*p2));
c1 = exp(A*x2.^2);
c2 = exp(A*x1.^2);
p_update = 1/(y1/(c1*p1)+(y2/(c2*p2)));
Delta_P = abs(p-p_update);
p = p_update;
count = count + 1;
end
I need to save p, x1, and x2 into vectors. The loop must also stay in a while loop. I have no idea on how I would go about saving them into vectors.
Thanks.

In your loop change only:
.
.
.
x1(count) = ((y1*p)/(c1*p1));
x2(count) = ((y2*p)/(c2*p2));
.
.
.
p(count) = p_update;
.
.
.

In addition to #Dans answer - you would need to either:
Change the initialisation of count to be count = 1;
or
Move the increment of count to be before you use it for x1(count) ....

plotting two functions on the same trendline in matlab

This is my original code:
function a = graph_times()
merge_times = [];
for i = 100:100:1000
curr = sort_timer(i);
merge_times = [merge_times, curr(1)];
end
plot(100:100:1000, merge_times);
a = 1;
end
I want to modify this code so that it plots trendlines for both insertion_sort and merge_sort on the same graph.
Below are the functions for merge_sort and insertion_sort
function c = insertion_sort(list1)
inserted = [];
for i = 1:size(list1,2)
inserted = insert_in_order(inserted,list1(1,i))
c = inserted
end
steps2=0;
function b = merge_sort(nums)
if size(nums,2) == 1
b = nums;
return;
end

You can give several sets of coordinates to MATLAB's plot function. You can plot the times of the two sorting algorithms like so:
plot(100:100:1000, merge_times, 100:100:1000, insertion_times);

How to extract the sequence matrix elements?

I have a matrix as shown in below:
A=[2;1;8;5;4;7]
now i need to extract the matrix A into 2 parts:
newpoint=[2];
rest=[1;8;5;4;7];
then apply loop again to extract the second column as new point :
newpoint=[1];
rest=[2;8;5;4;7];
Applying loop again to take third column number as new point :
newpoint=[8];
rest=[2;1;5;4;7];
Take the number in row sequence until the last row .
Can someone be kind enough to help.Thanks!

Something like that might do:
for i=1:length(A)
newpoint = A(i);
if i==1
rest = A(i+1:end);
else
if i== length(A);
rest = A(1:end-1);
else
rest=A(1:i-1,i+1:end);
... stuff to do
end

I would go for something like this:
for i = 1:size(A,1)
newpoint = A(i,1)
rest = A;
rest(i) = [];
%# use rest and newpoint
end
Or if you prefer saving all the rest and newpoints in a matrix:
newpoint = zeros(size(A,1),1);
rest = zeros(size(A,1)-1,size(A,1));
for i = 1:size(A,1)
newpoint(i) = A(i,1);
temp = A;
temp(i) = [];
rest(:,i) = temp;
end