error "The expression to the left of the equals sign is not a valid target for an assignment."
59 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Jiayuan
am 18 Apr. 2012
Kommentiert: Walter Roberson
am 12 Mai 2021
I run a test program shown below:
clear all;
clc;
image_a = imread('doll_full_color','png');
histo = histogram(image_a);
error comes:
??? Error: File: histogram.m Line: 12 Column: 30
The expression to the left of the equals sign is not a valid target for an assignment.
Error in ==> test_his at 5
histo = histogram(image_a);
For your information, histogram is a function I defined to calcuate the histogram of an image,shown below:
function [ histo ] = histogram( image )
%UNTITLED3 Summary of this function goes here
% Detailed explanation goes here
clc;
[row, column] = size(image,3);
histo = zeros(256,3);
histo_sum = zeros(256,3);
for m=1:1:3
for i=0:1:255
for j=1:1:row
for k=1:1:column
if( image(j,k,m) = i)
histo_sum(i,m) = histo_sum(i,m) +1;
end
end
end
end
end
histo = histo_sum/(row*column);
end
Anyone can help solve the problem? Thank you!
0 Kommentare
Akzeptierte Antwort
Weitere Antworten (4)
supriya
am 18 Apr. 2012
I m not sure but try this...
image_a = imread('doll_full_color.png'); histo = histogram(image_a);
zhang
am 19 Apr. 2013
but how to solve the problem blew:
clear all
t0=0;
dt=0.05;
t1=1;
tf=5;
t=[t0:dt:tf];
st=length(t);
n1=floor((t1-t0)/dt) x1=zeros(1,st); x(n1)=1/dt; subplot(2,2,1),stairs(t,x1),grid on
x2=[zeros(1,n1-1),ones(1,st-n1+1); subplot(2,2,3); stairs(t,x2); grid on w=10;; u=-0.5; x3=exp((u+j*w)*t); subplot(2,2,2),plot(t,real(x3)),grid on; subplot(2,2,4),plot(t,imag(x3)),grid on;
hope some can solve my problem!
1 Kommentar
dorai raj
am 11 Mai 2021
The expression to the left of the equals sign is not a valid target for an assignment
0 Kommentare
dorai raj
am 11 Mai 2021
i want h=1.3,where h=c/d:c=(n/m),m=(a/b)
n=1;
m=(1:10);
a=5;
b=(0.3:6);
while h>(c./d);
c=(n./m);d=(a./b);
h=1.3;
3 Kommentare
Walter Roberson
am 12 Mai 2021
c = n/m, m = a/b implies that c = n/(a/b) --> c = n*b/a
n and a are known values 2 and 1, so c = 2*b/1 --> c = 2*b
m is a/b where a = 1, so m = 1/b and m is restricted to 0.1 to 8 so that implies that b is restricted to the range 1/8 to 10 . But b = 0.4 to 9 which is a tighter restriction on both sides. The actual range of m is therefore 1/9 to 5/2
c = n/m and n = 2 and m is 1/9 to 5/2 so c = 2/(1/9 to 5/2) so c is in the range 2/9 to 5
h = c/d so h = (2/9 to 5) / d = 1.3 . So d = (2/9 to 5)/(13/10) which is 20/(9*13) to 50/3 which is about 0.171 to 16 2/3 .
There is not unique solution.
Siehe auch
Kategorien
Mehr zu Line Plots finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!